MoSi2/(Mo, Ti)Si2 dual-phase composite coating for oxidation protection of molybdenum alloy

被引：48

作者：

Li, Wei ^{[1
]}

Fan, Jinglian ^{[1
]}

Fan, Yan ^{[1
]}

Xiao, Lairong ^{[1
]}

Cheng, Huichao ^{[1
]}

机构：

[1] Cent S Univ, State Key Lab Powder Met, Lushan South Rd, Changsha 410083, Hunan, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 740卷

基金：

中国国家自然科学基金;

关键词：

Dual-phase composite coating; Oxidation resistance; C11(b) MoSi2; C40; (Mo; Ti)Si-2; Compound glass; X INTERMETALLICS X=AL; SI; TI; DEPOSITION; ELEMENTS; ZR; TA;

D O I：

10.1016/j.jallcom.2017.08.173

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new type MoSi2/(Mo, Ti)Si-2 dual-phase composite coating for oxidation protection was designed and prepared on molybdenum alloy by a method of fused slurry. High temperature oxidation resistance of the coating has been investigated by isothermal oxidation test. Microstructure evolution and phase transformation of the as-prepared and oxidized coating were characterized. The results show that the composite coating is composed of primary C11(b) MoSi2 and C40 (Mo, Ti)Si-2 phases. The substitution of molybdenum with titanium in MoSi2 gave (Mo,Ti)Si-2 of the C40 structure, resulting the formation of a C11(b) MoSi2/C40 (Mo, Ti)Si-2 dual-phase composite coating. The composite coating could provide long term oxidation resistant protection for Mo alloy at high temperature, attributing to the good protection of a Si-Ti-O compound glass formation during oxidation. (C) 2017 Published by Elsevier B.V.

引用

页码：711 / 718

页数：8

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