材料科学
烧结
微观结构
石墨烯
铜
复合材料
球磨机
氧化物
压痕硬度
复合数
扫描电子显微镜
微波食品加热
冶金
纳米技术
量子力学
物理
作者
Xuebin Chen,Lei Zhao,Liwu Jiang,Haizhou Wang
出处
期刊:Materials
[MDPI AG]
日期:2021-08-28
卷期号:14 (17): 4899-4899
被引量:7
摘要
This study investigated the effects of microwave sintering on the microstructures and properties of copper-rGO composites. Graphene oxide was coated onto copper particles by wet ball milling, and copper-rGO composites were formed upon microwave sintering in an argon atmosphere. Scanning electron microscopy was then used to observe the mixing in the ball-milled composite powder, and the morphology of the bulk composite after microwave sintering. Raman spectra revealed how graphene oxide changed with ball milling and with microwave sintering. The microhardness, electrical conductivity, and thermal conductivity of the composite were also measured. The results showed that graphene oxide and copper particles were well combined and uniformly distributed after wet ball milling. The overall microhardness of microwave-sintered samples was 81.1 HV, which was 14.2% greater than that of pure copper (71 HV). After microwave sintering, the microhardness of the samples in areas showing copper oxide precipitates with eutectic structures was 89.5 HV, whereas the microhardness of the precipitate-free areas was 70.6 HV. The electrical conductivity of the samples was 87.10 IACS%, and their thermal conductivity was 391.62 W·m−1·K−1.
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