Masoud Alizadeh

Masoud Alizadeh
Materials and Energy Research Center | MERC · Department of Ceramic Engineering

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73
Publications
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2,356
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Publications

Publications (73)
Article
Advanced ceramics are widely used in various industries like medical, automotive, and aerospace. Production of ceramic components has been constrained due to challenging machining procedures and the difficulty of forming complicated parts. Powder injection molding is one of the suitable methods to produce complex ceramics and overcome the difficult...
Article
In the present study, ZrO2 based composites were synthesized in-situ and sintered by the novel RSPS-assisted carbothermal reduction of ZrSiO4 (Z) in the presence of graphite (G) and Activated Carbon (AC). The RSPS process was performed using a vacuum furnace at different temperatures of 1400–1600°C for 5–15 min under an external pressure of 30 MPa....
Article
8 mol % Yttria stabilized zirconia (8YSZ) coatings are widely used as electrolytes in solid oxide fuel cells (SOFCs). In this study, sol-gel process was used in order to in-situ synthesis of 8YSZ electrolyte layer on NiO-8YSZ substrate applying dip coating method. Solid content, viscosity and withdrawal speed were investigated as effective paramete...
Article
Full-text available
The present work focuses on the preparation of V2C MXene from Al-V2O5-C mixture heated in a microwave and etched under HF-based process. In the first stage of process, microwave heating caused the formation of an uncommon periodic pattern of V2AlC-Al2O3 MAX phase. In the second stage of process the aggressive leaching (temperature of 80 °C for 96 h...
Article
In the present study, two V-Al-C based MAX phases, i.e., V2AlC and V4AlC3 having two types of ordering were successfully manufactured by spark plasma sintering and the corrosion behavior of sintered samples was evaluated. Al, V and C metal powders were mixed with the desired molar ratios by a mixer mill, and sintered at 1300°C. The relative dens...
Article
WC-Co cermets containing Ti and V metallic powders were prepared by ultra-fast microwave heating process. The mixing of WC-5wt%Co containing 5 wt% concentrations of Ti and V was performed by a high-energy mixer mill in ethanol media for 10 min. A fast microwave sintering process was carried out at temperatures of 1400, 1500 and 1600 °C with an aver...
Article
The present study investigated the microstructure and mechanical properties of spark plasma sintered mullite-Nd2O3 composite. 10 wt% Nd2O3 was added to the calcined mullite precursor using a simple mixing method after only 5 min of high energy milling in ethanol media and polyethylene cups. After that, two samples including mullite and mullite-Nd2O...
Article
The present work investigated the effects of Mo and Si metallic powders on the microstructure and mechanical properties of WC-5wt%Co cermets prepared through fast microwave heating process. Accordingly, 5 wt% Mo and 5 wt% Si were added separately to the WC-Co cermet and intensive mixing was performed using a high-energy ball mill. The prepared samp...
Article
This investigation presents the fabrication of hybrid Mg-Cr3C2+carbon fibers (Cf)+carbon nano tubes (CNTs) metal matrix composites through spark plasma sintering. 10 wt%Cr3C2, 1 wt% Cf and 1 wt%CNTs were added to Mg powders and mixing process was done through high energy mixer mill in ethanol media for 10 min. The sintering temperatures of 400 and...
Article
Full-text available
The physical characteristics of the materials such as specific surface area and particles size have great effect on their cellular properties and rate of bone bonding. In this study, bioactive glass based on CaO-SiO 2-P 2 O 5 system was produced through sol-gel technique at two different processing method: single step sol-gel route in which precurs...
Article
In this study, the microstructural and mechanical properties of three different mullite matrix composites were investigated. Accordingly, Mullite-TiN-CNT, Mullite-TiN-TiB2-CNT and Mullite-TiN-TiB2-ZrB2-CNT composites with 10 wt. % of each TiN, TiB2 and ZrB2 reinforcement particles as well as 1 wt. % CNT were prepared by the spark plasma sintering (...
Article
Full-text available
A near fully dense mullite-TiB2-CNTs hybrid composite was prepared successfully trough spark plasma sintering. 1 wt%CNT and 10 wt%TiB2 were mixed with nano-sized mullite powders using a high energy mixer mill. Spark plasma sintering was carried out at 1350 °C under the primary and final pressure of 10 MPa and 30 MPa, respectively. XRD results showe...
Article
A high density 10 wt.% ZrB2 and 1 wt.%. CNT-reinforced mullite-based composite was prepared by spark plasma sintering (SPS) at temperature of 1350ºC, average heating rate of 60°C/min and a soaking time of 5 min. Under these conditions, the sintered composite obtained a high hardness (16.24±0.12 GPa), fracture toughness (4.18±0.51 MPa.m1/2) and flex...
Article
The aim of this study was to find an optimum dose of the synthetic amorphous calcium phosphate (ACP) nanoparticles to be incorporated in resin-modified glass ionomer cements (RMGICs) for triggering the release of PO43−/Ca2+, alkaline phosphatase (ALP) activity and osteogenic differentiation of mesenchymal stem cells (hMSCs) without significantly af...
Article
In this study, 8 mol% yttria-stabilized zirconia (8YSZ)-agglomerated particles were dispersed in de-ionized water using different weights of Tiron. The results of viscosity and sedimentation measurements of each suspension were evaluated and the optimum amount of Tiron was selected. The most stable suspension was prepared for dip-coating. The subst...
Article
In the present work the corrosion behavior and in-vitro bioactivity of two kinds of porous Mg-metal matrix nano-composites separately reinforced with Al2O3 whiskers and Si3N4 particles were reported. 10 wt% of reinforcement was mixed with magnesium using high-energy ball milling and ethanol media for 10 min. After that, 10 ml ethylene glycol was ad...
Article
In the present work, SiC nanowires were formed unexpectedly during spark plasma sintering of WC-10 wt%Si cermet. The microstructure, hardness, bending strength and fracture toughness of WC-10 wt%Si were compared with conventional WC-10 wt%Co. The sintering temperatures were chosen according to time-temperature-displacement curves to enhance maximum...
Article
In-situ intermetallic-ceramic composites have been prepared successfully via spark plasma sintering process using Ti and Si3N4 starting materials. 5, 10 and 15 wt% of nano-sized Si3N4 particles were mixed with Ti powders by milling in ethanol media for 2 hours. Spark plasma sintering processes were performed at 1250 °C for each sample. It was obser...
Article
Super hard carbon microtubes derived from natural cotton are developed as a cost effective filler for composite applications. Two different carbon materials including synthesized carbon microtubes (CMT) and carbon nanotube (CNT) were used to produce titanium laminate composite via spark plasma sintering process. The sintering process was performed...
Article
Ammonium Aluminum Carbonate Hydroxide (AACH) is one of the nanostructure materials with a high surface area, which is mostly produced by the hydrothermal method. In this study, kinetics of the hydrothermal reaction has been accelerated with the addition of seed. Nucleation and growth steps have been studied by characterizing the obtained precipitat...
Article
The densification behavior, structural and microstructural evolution and microwave dielectric properties of Li2TiO3 + xZnO (x = 0, 0.5, 1, 1.5, 2, 3, and 5 mol%) ceramics have been investigated using X-ray diffraction, Field Emission Scanning Electron Microscopy, Raman spectroscopy and microwave resonant measurement. The Maximum density of 3.33 g/c...
Article
Full-text available
The effect of high-energy ball milling (HEBM) on the synthesis and sintering of Li2TiO3 was investigated. XRD Phase analysis of milled powders revealed a common phenomenon of peak broadening due to crystallite size reduction and loss of long-range periodicity. Thermal analysis results showed that the formation of Li2TiO3 can be facilitated with hig...
Article
The present study investigated preparation of the mullite/B4C composites through microwave and spark plasma sintering processes. A high-energy ball mill was used to mix the nono-sized mullite and B4C powders in ethanol media for 10 min. The mixed nano-sized powders were pelletized and sintered by microwave (MW) and spark plasma sintering (SPS) proc...
Article
Whisker presence in a ceramic matrix could increase mechanical strength and reduce thermal conductivity due to phonon scattering. Therefore it is a potential reinforcement in TBCs, However, due to difficult handling and lack of homogenous distribution, their usage is limited. In this study, semi-flowing granules of alumina whiskers were prepared by...
Article
In this study, mullite ceramic matrix composites (CMCs) reinforced with Ta⁠2O⁠5 particles (10wt%) were fabricated through spark plasma sintering (SPS) and microwave sintering (MW) methods. The prepared batches were sintered at 1200°C and 1300°C in SPS method. The composite was also sintered at 1300°C by MW method. In SPS, in order to achieve maximu...
Article
Full-text available
The vanadium carbide reinforced aluminium matrix composite has been fabricated successfully by using high-pressure spark plasma sintering at very low temperature (220 °C) for the first time. Applying 30, 150 and 300 MPa pressure have prepared three different samples. The microstructure investigation revealed layer-by-layer formation of the composit...
Article
In this study, Alumina reinforced Magnesium Matrix Composites have been prepared by two different sin-tering method: microwave and spark plasma sintering (SPS) processes. 5 wt% alumina whisker was blended with magnesium powders in ethanol media for 10 min. The sintering temperatures in the spark plasma and microwave furnace were at 420° and 700 °C,...
Article
In an attempt to develop the composition and properties of W2C-(W,Ti)C-TiC and WC-WC1-x-VC-V super hardmetals, spark plasma sintering (SPS) method was implemented. WC powders were mixed separately with 10 wt% Ti and 10 wt% V in a high energy mixer mill and sintering processes were performed at temperatures of 2150 and 2000 °C, respectively. XRD inv...
Article
Aluminum-10 wt% TiO2 metal matrix composites were fabricated with conventional, microwave, and spark plasma sintering processes. Aluminum and nano-sized TiO2 powders were mixed using a high-energy mixer, and the sintering process was done at 450℃ by spark plasma sintering and 600℃ under both microwave and conventional heating. The results showed mi...
Article
Super hard nickel and molybdenum reinforced WC cermet have been fabricated using spark plasma sintering at two different temperatures (1350° and 1950 °C). The XRD investigations confirmed the formation of Mo2C compound in sintered WC-10 wt% Mo sample; furthermore, no reaction between WC and Ni was detected and this is also confirmed by thermodynami...
Article
Full-text available
In this research, the mechanical properties and microstructure of Al-15 wt % TiC composite samples prepared by spark plasma, microwave, and conventional sintering were investigated. The sintering process was performed by the speak plasma sintering (SPS) technique, microwave and conventional furnaces at 400 • C, 600 • C, and 700 • C, respectively. T...
Article
Full-text available
This study discusses the potentials of spark plasma sintering (SPS) integrated with high temperature process that can enable sintering of SiC/Cf composites without any sintering aids. The random distribution of carbon fibers was obtained through mixing composite components in ethanol by using a shaker mill for 10min. The corresponding sintering pro...
Article
In detail characterisation of suspensions including nanomullite, nanosilicon carbide and various percentages of their composites has been studied in this Letter. Mechanism of particle ionisation, alternate pH and surface charge, particle size distribution, zeta potential, current density, electrophoresis movement and kinetics of time-weight curves...
Article
The aim of this study is to evaluate the fracture toughness and R-curve behavior of synthesized biphasic calcium phosphate (BCP) and yttria-tetragonal zirconia polygonal (YTZP) nanocomposites produced by spark plasma sintering (SPS) method. BCP comprising of 30 wt% hydroxyapatite and 70 wt% betatricalcium phosphate, was mixed with various amounts o...
Article
Calcium phosphate (CP) nanoparticles were synthesized in choline chloride-urea deep eutectic solvent (DES). The effect of synthesis time and temperature on crystallinity, particulate properties, and elemental/chemical purity of the CP nanoparticles were investigated by X-ray diffraction, field emission scanning electron microscopy, energy dispersiv...
Article
Full-text available
Aluminum-TaC composites containing 5, 10 and 15 wt% TaC as reinforcement particles were prepared by spark plasma sintering method. A high-energy ball mill was used to mix initial powders. All of the samples were sintered at 450 °C and the measurement results indicated that the maximum relative density, bending strength were achieved with 5 wt% TaC....
Chapter
Full-text available
In conventional thermal barrier coatings (TBCs) the major problem is the spalling of a ceramic coating. This could be due to the large thermal stresses which are generated during thermal cycling on the oxidizing environment. One of the ways to improve the life span and overcome mentioned problems is introducing the concept of functionally graded ma...
Article
Microwave and spark plasma sintering processes were used to produce magnesium-B4C metal matrix composites by powder metallurgy route. Magnesium powder with 5 wt% B4C in ethanol media was blended in a high-energy ball mill for 10 min. The sintering process was performed at 500° and 670 °C using spark plasma sintering and microwave furnace, respectiv...
Article
The aim of this study was to compare the mechanical properties of partially stabilized nanozirconia (PSZ)‒reinforced biphasic calcium phosphate (BCP) bone substitutes sintered in an electric furnace and by microwave irradiation. The BCP powder was mixed with different amounts (0–3 vol%) of PSZ and formed using an isostatic press. The green bodies w...
Article
Full-text available
Aluminum-15 wt. % zircon metal matrix composite was fabricated using spark plasma sintering method at the temperature of 450°C and holding time of 4 min. The bending strength of 284±21 MPa and microhardness of 171±14 Vickers were determined for produced composite. XRD investigations proved that almost no decomposition of zircon particles as reinfor...
Conference Paper
The aim of this study is to investigate how thymol content in chitosan films would affect on wound dressing properties. All films were prepared by solvent casting method. The water vapor permeability, mechanical properties and functional group interactions between the chitosan and thymol were studied. Film thickness was determined by a micrometer a...
Article
Amorphous calcium phosphate (ACP) nanoparticles were synthesized using a sustainable method based on precipitation of calcium and phosphate precursors in deep eutectic solvents (DESs). To this aim, three types of DESs, i.e., choline chloride-urea, choline chloride-ethylene glycol, and choline chloride-glycerol were prepared by simple heating-mixing...
Article
Nanocrystalline hydroxyapatite (HAp) powders were synthesized by a facile and sustainable method based on precipitation of calcium and phosphate reactants in choline chloride-urea deep eutectic solvent (DES). Characterization of the powders by X-ray diffraction, field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, and...
Article
In this research, biphasic calcium phosphate (BCP), comprising 70 wt% of beta tricalcium phosphate and 30 wt% of hydroxyapatite, was mixed with different amounts of 3 mol% yttria-stabilized zirconia (3YSZ) and sintered at 1200 °C to produce toughened bone substitutes. The fracture toughness (KIc) of the obtained bodies was determined using the inde...
Article
A novel and green method based on precipitation of calcium phosphate reactants in a deep eutectic solvent (DES) was devised for the synthesis of calcium phosphate nanoparticles. The DES was prepared by simple mixing-heating of choline chloride and urea. The effect of synthesis temperature on particulate and structural properties of the synthesized...
Article
This study investigates the effects of micro- and nano-sized SiC powder on the rheological behavior of Al based feedstocks for powder injection molding (PIM). Different compositions of Al feedstocks with additions of micro and nano-SiC powder were prepared and their rheological properties were measured with a rotational rheometer. The effects of Si...
Article
Artificial intelligence models have the capacity to eliminate the need for expensive experimental investigation in various areas of manufacturing processes, including the material science. This study investigates the applicability of adaptive neuro-fuzzy inference system (ANFIS) approach for modeling the performance parameters of thermal expansion...
Article
In this study, oxides Ln0.6Sr0.4Co0.2M0.8O3−δ (Ln = La,Nd and M = Mn,Fe) have been prepared and characterized to study the influence of the different cations on thermal expansion coefficient (TEC). TEC decreases favourably with replacement of Nd3+ and Mn3+ ions in the lattice. Nd3+ leads to decreasing ionicity of the Ln–O bond and phase transition...
Article
B 4 C reinforced aluminum composites were fabricated by microwave heating of the mixture of B 4 C (10, 15 and 20 wt%) and aluminum powders at 650, 750, 850 and 950 • C. The effect of different amounts of B 4 C on the microstructure and mechanical properties of aluminum matrix was examined. The maximum bending (238 ± 10 MPa) and compressive strength...
Article
Full-text available
This study aims to prepare optimal feedstock for fabrication of Al/SiC nanocomposites by the low-pressure injection molding technique. For this purpose, micron-sized aluminum and nanosized SiC powders were mixed with different amounts of the binder consisting of 89 wt% paraffin wax, 9 wt% bees wax, and 2 wt% stearic acid. Rheometry analyses as well...
Article
Full-text available
Bioactive glass nano-powders with the same chemical composition and different particle characteristics were synthesized by acid-catalyzed (the glass is called BG1) and acid–base catalyzed (BG2) sol–gel processes. Morphological characteristics of powders were determined by TEM and BET methods. The powders were separately mixed with 3% hyaluronic aci...
Article
Mullite-zirconia composites were fabricated through reaction sintering of mechanically activated alumina and zircon powder mixtures. X-ray diffraction results showed that increasing milling time resulted in gradual weakening and broadening of alumina and zircon peaks. For the sample milled for 70 h in which there are no peaks present from zircon, h...
Article
Full-text available
Bone cements based on calcium phosphate powder and different concentrations of colloidal silica suspensions were developed. Setting time and washout behavior of the cements were recorded and compared with those of a control group prepared by the same powder phase and distilled water as liquid. The phase composition, compressive strength, and morpho...
Article
Full-text available
This paper describes some physical, structural, and biological properties of gypsum bioceramics doped with various amounts of strontium ions (0.19-2.23 wt%) and compares these properties with those of a pure gypsum as control. Strontium-doped gypsum (gypsum:Sr) was obtained by mixing calcium sulfate hemihydrate powder and solutions of strontium nit...
Article
Bi2O3 compositions were prepared to investigate the effect of rare earth metal oxides as co-dopants on phase stability of bismuth oxide. Compositions containing 9–14 mol% of Y2O3 and Er2O3 were synthesized by solid state reaction. The structural characterization was carried out using X-ray powder diffraction. The XRD results show that the samples c...
Article
In this research, 8mol% yttria stabilized zirconia (8YSZ) powder were dispersed in de-ionized water by the use of different amounts of Tiron as dispersant. The results of rheological and sedimentation measurements of each suspension were evaluated and the optimum amount of Tiron was selected (0.8% Tiron). Also, various pH were investigated and the...
Article
In the present study hydroxyapatite (HA) and HA/nanosilica (NS) slurries were separately prepared by adding precipitated HA to distilled water and to colloidal silica suspension, respectively and their rheological properties were compared to each other. Both slurries where then dried, powdered, compacted as disks and sintered at 1100-1300 degrees C...
Article
New bismuth yttrium gadolinium oxide, Bi1.8Y0.1Gd0.1O3, synthesized from a stoichiometric mixture of Bi2O3, Y2O3, and Gd2O3, was characterized by X-ray powder diffraction. The compound was determined to be tetragonal, with space group P421c (114), unit-cell parameters of a=7.793 08(29) and c=5.665 71(40) Å, and the number of formulas per unit cell...
Article
There are some reports that confirm the increasing effect of orally administered lithium on bone density. In this study, different concentrations of Li2O was substituted for Na2O in 45S5 bioglass ® and effect of these substitutions on both in vitro apatite formation ability and osteoblasts responses was studied. The XRD and FTIR results revealed th...
Article
Strontium is known to reduce bone resorption and stimulate bone formation. Incorporation of strontium into calcium phosphate bioceramics has been widely reported. In this work, calcium and calcium/strontium silicophosphate glasses were synthesized from the sol-gel process and their rheological, thermal, and in vitro biological properties were studi...
Article
X-ray powder diffraction data for three new bismuth yttrium ytterbium oxide compounds synthesized by solid-state reaction method are reported. The unit-cell dimensions were determined from X-ray diffraction method using Cu K alpha radiation and evaluated by indexing programs. The cubic delta-Bi(2)O(3) phase was identified to he the sole crystalline...
Article
X-ray powder diffraction data for five new bismuth yttrium gadolinium oxide compounds synthesized by solid state reaction method are reported. The unit cell dimensions were determined from X-ray diffraction methods, using CuKα radiation, and evaluated by indexing programs. The cubic phase was the sole crystalline phase detected by X-ray diffraction...
Article
Full-text available
Influence of sintering temperature and soaking time on densification of Bi2O3 samples doped with 25%mol Y2O3 was investigated by shrinkage and relative density measurements. Samples were sintered in air at different temperatures in the range of 800 to 1000°C for 24 hr. The results showed that samples sintered at 950°C have the maximum relative dens...

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