Open AccessStudy on Diffusive Reaction Between C-Si System and Mo Metal
Author(s) -
C. Q. Li,
B. L. Liu,
Chao Zhao,
Xiaoyu Feng
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/678/1/012023
Subject(s) - materials science , microstructure , metal , phase (matter) , layer (electronics) , elongation , ultimate tensile strength , vickers hardness test , molybdenum , metallurgy , analytical chemistry (journal) , composite material , chemistry , organic chemistry , chromatography
Diffusive reaction layer on Mo metal covered by C powder (Si powder or SiC powder, i.e. C-Si system) and heat treated in vacuum ranging from 600°C to 1600°C for 2 h was investigated. Microstructure of interfacial reaction layer between C-Si system/Mo metal were characterized by XRD, SEM, and mechanical properties were compared between reaction layer based on Mo and Mo. The results show: after Si diffusing into Mo, Mo 3 Si phase appears after heat treatment higher than 1000°C, Mo 5 Si 3 phase forms at 1400°C, even MoSi 2 phase appears; after C diffusing into Mo, Mo 2 C phase appears firstly, then MoC forms at 1400°C; after SiC diffusing into Mo, Mo 2 C appears first, Mo3Si then forms at 1200°C, Mo 5 Si 3 (Mo2C and Mo5Si3C) mutiphase coexist on Mo surface after heat treatment high than 1400°C. Tensile and specific elongation of C-Si system/Mo vary little, but Vickers hardness of Mo diffused by C or Si comparing with Mo enhance distinctly.