期刊
NANOMATERIALS
卷 11, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/nano11020413
关键词
tungsten-(nano) copper composites; solid-state sintering; spark plasma sintering; microstructure; mechanical properties
类别
资金
- Ministry of Science and Technology of the Republic of China (Taiwan) [MOST 107-2221-E-194-024-MY3, MOST 109-2923-E-194002-MY3]
In this study, W-Cu composites were fabricated by adding various amounts of nano-copper to tungsten, showing improvements in densification, strength, hardness, and electrical conductivity with increasing copper content. Fractography analysis of tensile tested samples revealed a mixed-mode of fracture, and an increase in nano-copper content resulted in higher electrical conductivity.
In the present work, nano Cu (0, 5, 10, 15, 20, 25 wt.%) was added to W, and W-Cu composites were fabricated using the spark plasma sintering (S.P.S.) technique. The densification, microstructural evolution, tensile strength, micro-hardness, and electrical conductivity of the W-Cu composite samples were evaluated. It was observed that increasing the copper content resulted in increasing the relative sintered density, with the highest being 82.26% in the W75% + Cu25% composite. The XRD phase analysis indicated that there was no evidence of intermetallic phases. The highest ultimate (tensile) strength, micro-hardness, and electrical conductivity obtained was 415 MPa, 341.44 HV0.1, and 28.2% IACS, respectively, for a sample containing 25 wt.% nano-copper. Fractography of the tensile tested samples revealed a mixed-mode of fracture. As anticipated, increasing the nano-copper content in the samples resulted in increased electrical conductivity.
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