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February 2019 - present
February 2010 - present
Publications
Publications (54)
Medical applications for three-dimensional (3D) printing are spreading
briskly and are anticipated to reform healthcare. The current and potential
medical applications of 3D printing technology can be organized into
several broad categories, including fabricating porous scaffolds, orthoses
devices for tissue engineering, regenerative medicine, anat...
In recent years, electrospun nanofiber mats based on biopolymers have been extensively investigated for tissue and biomedical engineering, mainly because of remarkable morphological similarity with the natural extracel-lular matrix. The current study focuses on the preparation of novel natural spider silk (SS) embedded Poly(vinyl alcohol)(PVA)/Sodi...
Calcium phosphate glasses have a potential use as bone substituting applications, because of their chemical composition is closely similar to that of natural bone. The implant glass can be slowly replaced by regenerating tissue and has good biocompatibility and non-toxicity. In this experimental study, porous bioglass-ceramics were prepared via nat...
This study represents a comprehensive discussion of hydroxyapatite (HAp) formation from human and bovine bones. The phase formation and surface morphologies of prepared HAp powders were determined by XRD and SEM analyses, respectively. TEM was employed to understand the internal compositions with high magnifications and particle size. FT-IR charact...
NiTi shape memory alloys have attracted significant attention due to their unique shapememory effect, superelasticity, and excellent mechanical performance. In addition, the factthat NiTi alloys have high resistance to cavitation and corrosion makes them ideal candidatematerials in advanced tribological and biomedical applications. The NiTi alloy c...
![Figure 1: Schematic drawing of one hexagonal building unit of HA [001]...](profile/Kerim-Oeksuez/publication/330543548/figure/fig1/AS:717920804028417@1548177066942/Schematic-drawing-of-one-hexagonal-building-unit-of-HA-001-direction_Q320.jpg)
Tooth enamel, the hardest tissue in the human body, is composed mainly of calcium phosphate mineral crystals which has a chemical formula Ca 10 (PO 4) 6 (OH) 2 (HA, hydroxyapatite). Understanding the various properties of human teeth and dental materials is the basis for the development of restorative materials. The production of nano hydroxyapatit...
0.5 wt. % B 2 O 3-doped Ba(Ti 1-x Zr x)O 3 , (x=0-0.4) lead-free ceramics were synthesized using the solid-state reaction method by adopting the ball milling technique. The influence of the substitution content on crystallographic structure, phase transition, microstructure and sintering behavior of BT and BZT ceramics were investigated. XRD analys...
A sintered material based on pre-alloyed powders (Fe-Ni-Mo) is expansively applied in the automotive industry and Distaloy is today the most widely used raw material worldwide for the production of complex, precise, high strength PM machine parts. In this study a diffusion bonded powder type of Distaloy DC (Fe-2 wt. % Ni-1.5 wt. % Mo, Höganäs-Swede...
Several ceramic materials with a perovskite structure often exhibit interesting electronic properties and, therefore, are often called “electroceramics”. Electroceramics with high dielectric constants are used in capacitors and superconductors. The effect on calcination temperatures (1000°C–1400°C) and the changing of ions in A and B sites on the p...
NiTi shape memory alloys have attracted significant interest due to their unique superelasticity and high damping performance. In this work, the effect of SiC particle size on both physical and mechanical properties of NiTi matrix composite was investigated. Ni and Ti powders with particle sizes of 40 µm were used with the SiC addition with varying...
It is well known that sol-gel technique is a simple method to produce nano sized ceramic powders. In this study, cerium oxide doped zirconia samples, with 10 mol%-12mol% and14mol% CeO2, were synthesized by sol-gel technique and characterized. The surface morphology, elemental composition, microstructure, and phase analysis, of the sintered CeO2 dop...
Perovskite compounds have received keen interest from academic research due to their unique properties such as ferroelectric, pyroelectric, piezoelectric, and dielectric properties. Nano sized oxides of strontium doped barium zirconate of general formula Ba1-xSrxZrO3 (x= 0.2, 0.4, 0.6, 0.8) have been prepared by a solid-state procedure. The surface...
Ba(Ti1−xZrx)O3 (x = 0 ÷ 0.3) ceramics were prepared by the standard solid state reaction method and were sintered at 1450 • C for 4 h. The structural and dielectric properties of the samples were studied. The phases formed in the ZrO2 doped BaTiO3 were tetragonal and of cubic symmetry. Increase in ZrO2 content in the BaTiO3 caused to increase of th...
SiO2-doped BaTiO3 ceramics were prepared by solid state mixed oxide technique. The effect of small amounts (0.3 mol %) of SiO2 additive on the microstructure, sintering behavior and dielectric properties of BaTiO3-based ceramics have been investigated. SiO2-doped BaTiO3 ceramics sintered at 1175°C, 1200°C and 1225°C for 4h in air atmosphere have be...
There are many technical applications in which wear is a critical issue. Copper can be filled with particulate materials to enhance the tribological behavior, mechanical and physical properties as well. Copper matrix containing 10 vol.-% Al2O3 and B4C particles were produced using the powder metallurgy method and their dry wear behavior was investi...
Hydroxyapatite is the mineral component of natural hard tissues and, as such, it has been studied extensively as a candidate biomaterial for its use in prosthetic applications. This study presents the fabrication and characterization of Y 2 O 3 doped HA–Al 2 O 3 composite materials. Hydroxyapatite (HA) powder was obtained from bovine bones (BHA) vi...
Hydroxyapatite is the mineral component of natural hard tissues and, as such, it has been studied extensively as a candidate biomaterial for its use in prosthetic applications. This study presents the fabrication and characterization of Y2O3 doped HA–Al2O3 composite materials. Hydroxyapatite (HA) powder was obtained from bovine bones (BHA) via calc...
There have been widespread interests in recent decades in porous ceramics owing to their specific properties, such as low bulk density, low specific heat, low thermal conductivity and high specific surface area. Alumina has been one of the first developed advanced ceramics to be used in load bearing applications as orthopedic implants. The properti...
Different PM steels have found applications, mainly in the automotive industry for engine and transmission systems. In this paper examined in research on the microstructure and mechanical properties of Distaloy DC + 0.5%C + %0.6 introlube® with addition the silicon carbide. Specimens were prepared from diffusion alloyed Distaloy DC (Fe-2wt. % Ni-1....
High physical properties of sintered ceramics due to lower sintering temperatures and smaller grain sizes are of a great interest for researchers. In this study, YAG phase was formed successfully with mechanical activation of powder mixtures. The powders were compacted and sintered at 3 different temperatures to evaluate the sintering density, phas...
Increasing density is the best way to increase the performance of powder metallurgy materials. Conventional powder metallurgy processing can produce copper green compacts with density less than 8.3g/cm³ (a relative density of 93%). Warm compaction, which is a simple and economical forming process to prepare high density powder metallurgy parts or m...
The particulate reinforced aluminum alloy matrix composites are being increasingly used for wear component applications. The inuence of matrix aging treatment on wear behavior in a powder metallurgy 2124 Al-B4C composite was investigated. The aging responses of 2124 Al-B4C metal matrix composite (MMC) and unreinforced matrix alloy are studied and r...
In this study, the eect of B2O3 addition on the sintering behavior of 0-5-10% ZrO2 doped barium titanate based microwave dielectric ceramics were investigated. For this purpose, the powder mixtures consisting of BaCO3, TiO2 and ZrO2 were prepared by ball milling technique in alcohol using ZrO2 balls at 200 cycle/min for 20 h. The prepared powders w...
Cobalt is currently used in the production of diamond reinforced metal matrix composites (i.e. stone-cutting tools). Herein, how sintering temperature and matrix composition inuences the material properties of diamond reinforced MMCs was explored. The aim of this work is to produce diamond reinforced metal matrix composites based on Fe-Co compositi...
Cobalt is currently used in the production of diamond reinforced metal matrix composites (i.e. stone-cutting tools). Herein, how sintering temperature and matrix composition influences the material properties of diamond reinforced MMCs was explored. The aim of this work is to produce diamond reinforced metal matrix composites based on Fe-Co composi...
0.5 wt. % B 2 O 3 doped BaZr x Ti 1-x O 3 ceramics (x = 0, 0.1, 0.2, 0.3, 0.4) were synthesized by adapting the solid-state synthesis method. B 2 O 3 used as a sintering additive in the BT and BZT ceramics can vaporize easily at high temperatures, so it can be adopted as a vapor dopant. The influence of the substitution content on the crystallograp...
Powder metallurgy enables cost effective production of powder metallurgy (PM)
parts with complex geometries in automotive applications. PM materials are also
extensively used for the production of components subjected to working
conditions giving rise to sliding, rolling or abrasive wear, such as gears or cams.
In this experimental study, Fe based...
Fe-Cu-Co alloys are the new generation of metal matrix for diamonds in PM processed cutting tools. These alloys were created with the purpose of reducing the cobalt content in diamond tools. Nevertheless, little have been published, once this is a matter of industrial interest. In this work, samples of Fe-(10-20)wt. %Cu and Fe-(10-20) wt. %Cu -1%wt...
Metal matrix composites (MMCs) have gained a considerable interest in the last three decades. Conventional powder metallurgy production route often involves the addition of reinforcing phases into the metal matrix directly, which leads to poor wetting behavior between ceramic phase and metal matrix and the segregation of reinforcements. The commonl...
The effects of sintering temperature and addition of Fe instead of Co into the matrix composition on the mechanical properties of diamond-reinforced MMC’s have been studied. Diamond-reinforced MMC’s based on Fe-Co compositions with and without boron carbide (B4C) have been processed. Three different matrix composites (with different Fe/Co ratios) h...
TiNi shape memory alloy and its composite using
δ-Al2O3 nanosize particles were prepared by
the powder metallurgy method, and some mechanical properties like
hardness, wear, and corrosion behavior were investigated. The
experimental results exhibited that the lower wear rate was obtained for
the nano-Al2O3-reinforced Ti alloy composite due
to incre...
Aluminum alloys have been extensively used as structural material due to its high strength and damage-tolerance. Alloy 6061, 2024 and 7075 are engineered to be lightweight and strong,and their ease of formability allows complex shapes and drawn parts,which can then be further enhanced with heat treating. In this study is aimed to improve the mechan...
The effects of boron carbide (B4C) additions on characteristic of diamond impregnated Fe-Co-Cu matrix composites have been investigated using powder metallurgy (PM) method. For this purpose, samples of Fe-(30-60)wt. % Cu–20 wt. %Co alloys and1wt. % B4C additions of its matrix were processed by cold pressing at 350 MPa, followed by sintering at 1100...
Al2124-20wt.% SiCp composites were prepared by powder metallurgy (PM) method and investigated the tribological behavior of MMCs. S/N ratio analysis and analysis of variance (ANOVA) were employed to investigate which design parameters significantly affected the wear of the composites. The hardness of the matrix alloy increased from 44.2 HRB up to 87...
Keywords: Boron Carbide; Silisium Carbide; Composite; Powder Metallurgy. Abstract : In this study, effect of boron carbide (B4C), aluminium oxide (Al2O3) and silisium carbide (SiC) addition on microstructure and mechanical properties of diamond cutting segments was investigated. The effects of reinforcement particle additions on characteristic of C...
In this study, effect of boron carbide (B 4 C), aluminium oxide (Al 2 O 3) and silisium carbide (SiC) addition on microstructure and mechanical properties of diamond cutting segments was investigated. The effects of reinforcement particle additions on characteristic of CuSn matrix composites have been investigated. For this purpose, Al 2 O 3, SiC a...
Aluminium alloys (Al2014 and Al2124 alloy) and their composites containing 10wt.% Al2O3 with 3 μm and 43 μm sizes of particles have been produced by powder metallurgy (PM) method and the microstructure and hardness were investigated. Scanning electron microscopy (SEM) investigation showed a nearly uniform distribution of the Al2O3 particles within...
Fe-Co based diamond-reinforced composites (D-MMCs) and diamond+SiC-reinforced composites (D+SiC-MMCs) were produced by cold pressing method. Investigation of the wear behaviors on two-body abrasive wear behavior of the composites were carried out under different conditions. 2k factorial designs of experiments were used to obtain the data in a contr...
Diamond tools are widely used for sawing, drilling and grinding materials. The extreme hardness of diamonds and the strength of the diamond/matrix combination make these tools superior. In this experimental study, diamond impregnated in Fe-Co matrix are processed by powder metallurgy method using hot pressing technique. The effects of Fe and boron...
Tribological behavior of diamond-reinforced Fe-Co composites was studied. SN ratio and ANOVA were employed to investigate the influence of parameters like, abrasive size, load, distance and hardness. The load factor was the major parameter, followed by abrasive size. The percent contributions are abrasive size (32.17 %), hardness (11.30 %).
In this study, impregnated diamond cutting tools (Fe-Co matrix composite sockets) are processed by powder metallurgy method using hot pressing technique. The effects of Fe and B4C additions on the characteristic of diamond impregnated Co matrix composites have been investigated. Samples reinforced with and without B4C having three different composi...
Projects
Projects (4)
Application of Magnetic and Triggerable Drug Delivery Systems in Early Stage Breast Cancer
With the development of medical technology in recent years, the use of personalized medicines and medical devices is developing extremely widely. Personalized drug dosage forms for each patient are economically produced using 3D additive manufacturing technology. The main purpose of drug delivery systems is to increase therapeutic efficacy and minimize side effects by providing more convenient and efficient drug applications that are compatible with patients.
It successfully provides optimum distribution and absorption of pharmaceutical compounds. Targeting controlled drug releases via magnetic activation in trigger drug systems is among the interesting and worthwhile topics for biomedical engineering. In these systems, such as instant and reversible response, remote intervention and operation, non-destructive and high controllability.
has many advantages.
These magnetic systems play an important role in cancer research due to their superior abilities in chemotherapy applications;
- selecting and delivering the desired region of the maximum fraction of anti-cancer molecules
- normal/healthy cells are not affected by chemotherapeutic agents
- delivery of anti-cancer drugs to targeted cells
- stable systemic drug concentrations
- It offers excellent features such as elimination of normal tissue clearance with the application of external magnetic field.
(Recycling of Waste Lead Paste by Electro Reduction Method)
