https://orcid.org/0000-0003-0658-8098
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ABSTRACT
The difficulty of manufacturing industrial W-Cu alloys by traditional techniques encourages the study of processing by advanced powder metallurgy. From among hot pressing techniques, Rapid Sinter Pressing has been selected since it offers short cycles and versatility. The effect on the properties of W-Cu alloys manufactured by this fabrication method has been studied, in which the processing parameters have been fixed (980°C, 150 MPa, 15 bar/s and 40 s). Different particle sizes of the starting powder materials together with various relative alloy compositions have been employed in order to determine the degree of influence on properties such as hardness, density and thermal conductivity. Through a microstructural characterisation of the samples, the best distribution was related to the use of the intermediate size W particles and fine Cu particles. Concerning the properties, the composition based on 80W-20Cu resulted in the best combination.
Acknowledgements
We thank the Microscopy and the X-Ray Laboratory Services of CITIUS (Universidad de Sevilla).
Disclosure statement
No potential conflict of interest was reported by the author(s).
Notes on contributors
Dr Eva María Perez-Soriano got her Diploma in Industrial Engineering at the University of Seville (Spain). After working for several years for private companies, she came back to the University to get her master’s degree in Science and Technology of New Materials and defend her PhD in controlled-size porosity for LHPs. She is currently a lecturer and researcher at the Department of Materials Science and Transport and Engineering in this University, and researches on lightweight metal matrix composites (TMCs) reinforced with ceramic particles to produce in-situ secondary phases, and, more recently, in Additive Manufacturing techniques.
Dr Cristina Arévalo got her Diploma in Physics at the University of Seville (Spain). She holds a PhD in nuclear engineering from the Polytechnic University of Madrid. She is currently a senior lecturer and researcher at the Department of Materials Science and Transport and Engineering in the University of Seville, and researches on multiscale modelling materials, and the microstructural and mechanical characterization of lightweight metal matrix composites (TMCs) and metals processed via Additive Manufacturing techniques.
Dr Isabel Montealegre-Meléndez is lecturer-researcher at the University of Seville. She received her bachelor’s degree in Chemical Engineering from the University of Granada and her M.D. at the Technische Universität Wien (Austria) before eventually becoming Doctor at the Austrian Research Centre in 2009. As an industrial doctoral student at ARCs and TUWien, she developed investigations in powder metallurgy and metal-matrix composites, researching titanium reinforced by CNTs, boron, nanodiamonds, etc. After her seven-year career as a researcher in Austria, she returned to Spain. She currently investigates in-situ reinforced composites and in additive manufacturing with the intention to develop composites via this technique.
Dr Erich Neubauer has a degree and a PhD in Physics from the Vienna University of Technology. He is the manager of the RHP-Technology GmbH from Austria, specialized in manufacturing components for various industrial applications via advanced techniques of powder metallurgy: metal matrix composites, sputtering target materials with customized composition for thin film deposition, metal diamond heat sink materials, hot pressing and sintering, additive manufacturing - plasma metal deposition, advanced materials - tiger metals, bulk metallic glasses, and high entropy alloys.
D.I. Michael Kitzmantel studied technical physics at the Vienna University of Technology in Austria. In 2010 he founded the high-tech company RHP-Technology GmbH together with Erich Neubauer from the research group “Powder Technology Center” of the then Austrian Research Center. His current research interests focus on powder technology of high-performance materials, micro-injection molding of metals and ceramics as well as new generative manufacturing technologies such as FFF for metal and ceramics as well as XXL 3D printing (PMD). Michael Kitzmantel initiates and works in several national and international research projects.