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Fabrication of diamond/W–Cu functionally graded material by microwave sintering
Nuclear Engineering and Technology ( IF 2.7 ) Pub Date : 2021-08-31 , DOI: 10.1016/j.net.2021.08.035
Chenlong Wei 1, 2, 3 , Jigui Cheng 1, 3 , Mei Zhang 1, 3 , Rui Zhou 1, 3 , Bangzheng Wei 1, 3 , Xinxi Yu 1, 3 , Laima Luo 1, 3 , Pengqi Chen 1, 3
Affiliation  

A four-layered W/Cu functionally graded material (FGM) (W90% + Cu10%/W80% + Cu20%/W70% + Cu30%/W60% + Cu40%, wt.% fraction) and a four-layered diamond/W–Cu FGM (W90% + Cu10%/W80% + Cu20%/W70% + Cu30%/W55% + Cu40% + diamond5%, wt.% fraction) were fabricated by microwave sintering. The thermal conductivity and thermal shock resistance of diamond/W–Cu FGM and W–Cu FGM were investigated. The morphologies of the diamond particles and different FGMs were analyzed using AFM, SEM, EDS, and TEM. The results show that a 200 nm rough tungsten coating was formed on the surface of the diamond. The density of the tungsten-coated diamond/W–Cu FGM, obtained by microwave sintering at 1200 °C for 30 min, was 94.66%. The thermal conductivity of the four-layered diamond/W–Cu FGM was 220 W·m-1·K-1, which is higher than that of the four-layered W/Cu FGM (209 W m−1 K−1). This indicates that adding an appropriate amount of tungsten-coated diamond to the high Cu layer W/Cu FGM improves the thermal conductivity of the composite. The diamond/W–Cu FGM sintered at 1200 °C for 10 min exhibited better thermal shock resistance than diamond/W–Cu FGM sintered at 1100 °C for 10 min.



中文翻译:

微波烧结制备金刚石/W-Cu功能梯度材料

四层 W/Cu 功能梯度材料 (FGM) (W90% + Cu10%/W80% + Cu20%/W70% + Cu30%/W60% + Cu40%, wt.% 分数) 和四层金刚石/ W-Cu FGM (W90% + Cu10%/W80% + Cu20%/W70% + Cu30%/W55% + Cu40% + diamond5%, wt.% fraction)是通过微波烧结制造的。研究了金刚石/W-Cu FGM 和 W-Cu FGM 的热导率和抗热震性。使用 AFM、SEM、EDS 和 TEM 分析金刚石颗粒和不同 FGM 的形态。结果表明,在金刚石表面形成了200nm的粗钨涂层。通过在 1200 ℃下微波烧结 30 分钟获得的钨涂层金刚石/W-Cu FGM 的密度为 94.66%。四层金刚石/W-Cu FGM的热导率为220 W·m -1 ·K -1,这高于四层 W/Cu FGM (209 W m -1  K -1 )。这表明在高铜层 W/Cu FGM 中添加适量的钨涂层金刚石可提高复合材料的导热性。在 1200°C 烧结 10 分钟的金刚石/W-Cu FGM 表现出比在 1100°C 烧结 10 分钟的金刚石/W-Cu FGM 更好的抗热震性。

更新日期:2021-08-31
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