Wettability and Interface Reaction of Sn-Cr powder alloy on Poly-crystalline Diamond (PCD)

4th International Conference on Applied Materials and Manufacturing Technology

材料科学;机械制造

Chen, Jinchang^1,2 ; Mu, Dekui^1,2 ; Liao, Xinjiang^1,2 ; Huang, Hui^1,2 ; Xu, Xipeng^1,2

Institute of Manufacturing Engineering, Huaqiao University, Xiamen

361021, China^1

Fujian Engineering Research Center of Intelligent Manufacturing for Brittle Materials, MOE, China^2

关键词: Chromium carbide;    Continuous layers;    Cr alloys;    Interface reactions;    Polycrystalline diamonds;    Powder alloys;    Sessile drop method;    Wetting temperature;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/423/1/012063/pdf
DOI  :  10.1088/1757-899X/423/1/012063

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this work, the isothermal wetting of the Sn-Cr powder alloy containing 1.0, 2.0 and 4.0 wt.% Cr on Poly-crystalline diamond (PCD) substrates was investigated using a sessile drop method. The addition of active Cr significantly improved the wettability of Sn-Cr alloy at a temperature above 700 °C, and a minimum contact angle less than 20° was observed between Sn-2wt%Cr alloy and PCD substrate. The interfacial reaction between Sn-2Cr and PCD were strongly dependent on wetting temperature. A thick and continuous layer of chromium carbide was formed as wetting temperature increased from 700 to 750 °C, which consequently enhanced the wettability of Sn-Cr alloy on PCD substrate.