The microstructure and property of W/Ti multilayer composites prepared by spark plasma sintering |
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| Affiliation: | 1. School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China;2. Industry and Equipment Technology Institute of HFUT, Hefei University of Technology, Hefei 230009, China;3. International Joint Laboratory for Light Alloys (Ministry of Education), College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;4. China International S&T Cooperation Base for Advanced Energy and Environmental Materials, Hefei 230009, China;5. State Key Laboratory for Strength and Vibration of Mechanical Structures, Xian Jiaotong University, Xian, Shanxi 710049, China;6. Institut für Energie und Klimaforschung-Plasmaphysik, Forschungszentrum Jülich GmbH, Jülich 52425, Germany;1. Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Wuhan Institute of Technology, Wuhan 430073, China;2. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | The W/Ti multilayer composites are prepared by spark plasma sintering. The original constituents are cold-rolled W foils with elongated grains and annealed Ti-1.5Al foils with fine equiaxed grains. After diffusion bonding, both elongated grains and fine equiaxed grains can be seen in the W layers. The diffusion rate of W in Ti is much faster than that of Ti in W due to different methods of diffusion. The detailed microstructure of W/Ti laminates can be divided into four types at different regions including pure W, mixture of α-W and β-Ti with light and dark lamellas, pure β-Ti and Ti-rich Widmanstäten α-β structure with alternative light and dark lamellas. Compared with the microhardness of original materials, the microhardness of W layers slightly decreases and the microhardness of Ti layers increases dramatically. |
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