Effect of Nb–Al–SiC elements combined with pre-oxidation treatment on the pesting resistance of MoSi2
作者： Qiong Lu , Xu Chen , Jing Lian Fan
DOI: 10.1016/J.CERAMINT.2019.05.041
关键词:
摘要: Abstract Nb, Al, SiC elements were introduced into the matrix to improve pest phenomenon of MoSi2 composites. The results showed that although oxidation rate composite decreased, phenomena eventually occurred at temperature 500 °C and 750 °C. And after 120 h oxidation, bending strength decreased dramatically from 472 MPa 258 MPa (500 °C) 225 MPa (750 °C). In order solve this problem, pre-oxidation has been adopted. During 1200 °C via exposure air, a dense fibrous layer was in-situ formed, which had excellent adhesion matrix. substrate adjoins interface oxide oxidized nano-sized grains. This played important roles in eliminating composite.
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