Mechanical and microstructural characterization of W_Cu FGM fabricated by one-step sintering method through PM route

7th National Conference on Processing and Characterization of Materials

Gupta, Rajat^1 ; Kumar, Rohit^1 ; Chaubey, A.K.^1 ; Kanpara, Shailesh^2 ; Khirwadkar, S.S.^2

CSIR-Institute of Minerals and Materials Technology (CSIR-IMMT), Bhubaneswar

751013, India^1

Institute for Plasma Research, Gandhinagar

382428, India^2

关键词: Functionally graded layers;    Functionally graded material (FGM);    Micro-structural characterization;    Plasma facing materials;    Resistance sintering;    Sintering temperatures;    Surface scratch resistance;    Theoretical density;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/338/1/012042/pdf
DOI  :  10.1088/1757-899X/338/1/012042

来源: IOP

【 摘 要 】

Five layer W-Cu functionally graded material (FGM) for components in nuclear fusion application was fabricated by a one-step resistance sintering process, known as spark plasma sintering (SPS). In this study effect of sintering temperature (Ts) on physical, mechanical and surface property was investigated. Detailed microstructural study revealed that the graded structure of the composite layers with varying composition from 0 to 100 wt% W and Cu in opposite directions could be well densified after the SPS process. It also indicates that the fine microstructure within functionally graded layers can be maintained because of short sintering time. The sample sintered at 1050°C shows more than 90% theoretical density, hardness greater than 239±5 Hv and excellent surface scratch resistance. The result demonstrates that SPS is promising and more suitable process for fabrication of W-Cu FGM.