Mikel Rodríguez-Arbaizar

Mikel Rodríguez-Arbaizar
HES-SO Valais-Wallis | HES-SO · Powder Technology and Advanced Materials Group

Master in Materials Science and Engineering

About

40
Publications
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292
Citations
Citations since 2017
15 Research Items
193 Citations
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2017201820192020202120222023010203040
2017201820192020202120222023010203040

Publications

Publications (40)
Article
Filament extrusion-based additive manufacturing of metals offers an alternative to the widespread beam-based counterparts. The microstructure obtained from extrusion-based techniques differs greatly from the ones obtained by beam-based additive manufacturing, as a sintering process is used, in contrast to the rapid solidification of a melt pool. In...
Article
Filament extrusion-based additive manufacturing of metals offers an alternative to the widespread beam-based counterparts. The microstructure obtained from extrusionbased techniques differs greatly from the ones obtained by beam-based additive manufacturing, as a sintering process is used rather than the of rapid solidification of a melt pool. In t...
Article
Additive manufacturing of metals by 3D printing of polymeric filaments containing high loading of metal powder, subsequent debinding, and sintering offers a potent alternative to the widespread beam-based processes. The polymeric binder is the decisive component for a successful fabrication process. This study presents the development of a multi-co...
Preprint
Full-text available
Cemented carbide parts have been manufactured from WC-12Co granules by "Solvent on Granules 3D-Printing" and compared with reference parts produced by conventional press and sintering. SG-3DP consists in growing a green part layer-by-layer by selective solvent jetting on powder-polymer granule beds. Both 3D printed green parts and uniaxially presse...
Article
Full-text available
Cemented carbide parts have been manufactured from WC-12Co granules by “Solvent on Granules 3D-Printing” and compared with reference parts produced by conventional press and sintering. SG-3DP consists in growing a green part layer-by-layer by selective solvent jetting on powder-polymer granule beds. Both 3D printed green parts and uniaxially presse...
Chapter
Titanium hydride powder offers a cost-effective alternative to process high performance titanium parts. Hydrogen release during thermal treatment helps to reduce surface oxides and allows to keep a low level of impurity content in sintered parts, which is critical to obtain good mechanical properties. Recent advances on powder pressing, powder inje...
Article
Titanium parts are produced by the “Solvent on granule 3D-Printing” technique (SG-3DP). Angular Titanium Hydride powders are used. A special purpose table-top machine, designed and built in a previous development, is used to print green parts, which are subsequently debinded, dehydrided and sintered in a muffle furnace. Porous electrode plates are...
Conference Paper
Nearly stoichiometric NiTi parts have been produced by selected laser melting from pre-alloyed powders. Both test specimens and complex parts have been processed. As-built parts with density higher than 99% of theoretical have been obtained. In contrast to the generally used compression testing, in this paper, the mechanical behaviour of SLM NiTi h...
Article
Full-text available
Tungsten cemented carbide parts have been produced by the “Solvent on Granule” 3D-Printing technique. It consists in growing layer-by-layer a green part by spreading a powder-polymer granule bed, followed by selective solvent jetting, and layer consolidation after solvent evaporation. The granules are prepared by wet blending, drying, milling and s...
Experiment Findings
Full-text available
The published research works on superelasticity of NiTi processed by SLM have almost only addressed mechanical behavior under compression loading. Indeed tensile loading is more challenging than compression regarding the influence of defects as cracks and pores, which can lead to premature failure even at low stress levels. Tensile behaviour should...
Conference Paper
Full-text available
Powder-bed based additive manufacturing includes selective laser melting, electron beam melting, feedstock deposition by extrusion and inkjet printing techniques. The first two techniques produce near-net-shape parts, which usually need further mechanical removal of support structures and thermal treatment to release thermal stresses in the case of...
Conference Paper
Invar Fe36Ni parts are produced by the "solvent on granule" 3D-Printing technique. Both elementary and prealloyed powders are used. A special purpose tabletop machine, designed and built in a previous development, is used to print green parts, which are subsequently debinded and sintered in a muffle furnace. Prismatic specimens for thermal expansio...
Experiment Findings
Full-text available
Green parts processed by Solvent on granule 3D-printing. Sintered parts consolidated at high temperature under nitrogen atmosphere
Article
Full-text available
Nickel-free stainless steels are of high interest for medical and dental applications, as well as consumer goods where contact with the skin is a consideration. In this paper Prof Efraín Carreño-Morelli and colleagues from the University of Applied Sciences and Arts Western Switzerland evaluate the MIM processing of the high-nitrogen content austen...
Article
Soft magnetic materials are used in a wide variety of electromagnetic devices such as motors, relays and sensors. Over the years, the devices are becoming smaller. Therefore, it is essential to produce small parts without compromising the final properties. Metal injection moulding (MIM) is a cost-effective technique to produce small and complex sof...
Conference Paper
This paper presents recent developments on press and sintering of titanium from metal hydride powder. Titanium hydride offers a low cost solution compared with pure titanium powder. Different lubricants have been used for uniaxial compaction in an electric press. Dog bone specimens for tensile tests have been pressed, dehydrided and sintered. Sinte...
Conference Paper
High-nitrogen content austenitic stainless steel parts have been processed by injection moulding of a novel feedstock composed of gas atomized P558 stainless steel powder and biopolymer-based binder. The binder formulation consists of polyhydroxyalkanoate backbone polymer produced by bacterial fermentation, filler wax and surfactant. The solids loa...
Conference Paper
A "Solvent on Granule" 3D-Printing technique has been developed, which consists in the spreading of a powder-polymer granule bed, followed by the selective jetting of a solvent (which softens the polymer contained in the granules), and layer consolidation after solvent evaporation. The granules are prepared by wet blending, drying, milling and siev...
Conference Paper
Ti-13Nb-13Zr is a low modulus near- titanium alloy developed for surgical implants. In this work, the possibility of producing Ti-13Nb-13Zr parts by metal injection moulding is evaluated. Tensile test specimens are injection moulded using a feedstock based on elemental powders, then debinded and sintered. In an attempt to further decrease the elas...
Article
Full-text available
TiNi shape-memory properties are successfully used today for the fabrication of various technical devices. The limited machinability and high cost of TiNi encourage the use of near-net shape production techniques such as metal injection moulding. In this work TiNi alloys tensile test specimens are produced by metal injection moulding from pre-alloy...
Article
Full-text available
Nickel-free stainless steels are used in prosthetics to avoid the harmful effect of nickel-ion release in the human body. Metal powder injection moulding (MIM) allows net-shape processing of complex parts from metal- polymer feedstocks . The feasibility of a novel binder formulation using biosourced polymer produced by bacterial fermentation is exp...
Article
Ti–Nb alloys are attractive as biomaterials because of their excellent combination of low elastic modulus, high strength, corrosion resistance and enhanced biocompatibility. The effect of a post-sintering quenching treatment on the microstructure and mechanical properties of powder injection moulded Ti–17Nb has been investigated. Tensile test speci...
Article
Biocompatibility, bone-like mechanical properties, and good bone-to-implant anchorage are current requirements for permanent implants. Porous titanium can satisfy these requirements provided that sufficient porosity, large enough pores and interconnections allowing bone ingrowth can reliably be obtained with controlled processes. In the present wor...
Article
Recent developments are presented on powder injection moulding of titanium from metal hydride powders and binders composed of polyethylene, paraffin wax and stearic acid. The feasibility of using this route to process fit for purpose, complex parts is assessed. Titanium hydride offers a low cost solution compared with pure titanium powders. Feedsto...
Article
Titanium alloys containing β stabilising elements such as Nb, Zr and Ta are particularly promising as implant materials because of their excellent combination of low modulus, high strength, corrosion resistance and biocompatibility. A low elastic modulus is important for implants to avoid stress shielding and associated bone resorption. The difficu...
Article
Full-text available
Porous titanium is used as implant material because of its high specific strength, bone-like stiffness, biocompatibility and good bone cell ingrowth provided that the open pores have sizes between 100 μm and 500μm. Powder metallurgy has been successfully used to produce titanium foams by using the space holder method [1-3]. Recently, Ti grade 4 has...
Article
Full-text available
Ti alloys containing β stabilising elements such as Nb, Zr and Ta are particularly promising as implant materials because of their excellent combination of low modulus, high strength, corrosion resistance and biocompatibility. A low elastic modulus is important for implants to avoid stress shielding and associated bone resorption. The difficulty of...
Conference Paper
Full-text available
Powder injection moulding is an enabling technology for the production of soft ferromagnetic components, which bring solutions and open the way for new applications. In this work, square toroid parts have been injection moulded for three typical soft magnetic alloy compositions. Fe2.7Si, Fe50Ni and Fe50Co feedstocks were produced by mixing elementa...
Article
Full-text available
Ti alloys containing β stabilising elements such as Nb, Zr and Ta are particularly promising as implant materials because of their excellent combination of low modulus, high strength, corrosion resistance and biocompatibility. A low elastic modulus is important for implants to avoid stress shielding and associated bone resorption. The difficulty of...
Conference Paper
Full-text available
Titanium thin sheets have been fabricated by tape casting using slurries based on titanium hydride powder. Titanium hydride is attractive because of its reduced cost with respect to pure titanium. Sheets of various thicknesses were tape cast, debinded, dehydrided and sintered. Porous sheets with even surfaces were obtained. Scanning electron micros...
Article
Full-text available
INTRODUCTION: The fabrication of titanium-based implants and medical devices usually needs several complex steps 1. Net-shape processing by powder injection moulding (PIM 2) of titanium hydride powders, which are cheaper and less reactive than titanium powders, can be the solution for breaking the cost barrier 3 .
Article
Full-text available
Titanium parts have been processed from feedstocks composed of titanium hydride powders, low density polyethylene, paraffin wax and stearic acid. A two-step debinding process has been used, which consists of solvent debinding in heptane at 50°C followed by thermal debinding at 500°C. Sintering was performed at 1200°C. Both thermal debinding and sin...
Technical Report
Full-text available
published in Metall Russia: Processing of titanium parts by powder injection moulding of TiH2 powder, followed by debinding and sintering in a molybdenum muffle furnace
Conference Paper
Full-text available
Net-Shape Al6061-0. 5vol. %SiC nanocomposites were produced by powder injection moulding. Nano-sized SiC powders were produced by inductively coupled plasma synthesis and mixed with gas atomized Al6061powder in a high energy planetary ball mill. 2 wt. % of Sn powder was added as a sintering aid to perform a liquid phase sintering. A feedstock conta...
Article
Full-text available
Titanium parts have been processed from feedstocks composed of titanium hydride powders, low density polyethylene, paraffin wax and stearic acid. A two-step debinding process has been used, which consists of solvent debinding in heptane at 50°C followed by thermal debinding at 500°C. Sintering was performed at 1200°C. Both thermal debinding and sin...
Article
Full-text available
Titanium parts have been processed from feedstocks composed of titanium hydride powders, low density polyethylene, paraffin wax and stearic acid. A two-step debinding process has been used, which consists of solvent debinding in heptane at 50°C followed by thermal debinding at 500°C. Sintering was performed at 1200°C. Both thermal debinding and sin...
Conference Paper
Full-text available
Titanium parts have been processed from feedstocks composed of titanium hydride powders, low density polyethylene, paraffin wax and stearic acid. A two-step debinding process has been used, which consists of solvent debinding in heptane at 50°C followed by thermal debinding at 500°C. Sintering was performed at 1200°C. Both thermal debinding and sin...

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Projects

Projects (6)
Project
Powder injection moulding, tape casting, screen printing and powder compaction are used to process materials with specific magnetic, electrical and chemical properties.