Study of the Behavior of Mo40Si40B20 Coatings in the Temperature Range of 1000-1200°C

被引：2

作者：

Kiryukhantsev-Korneev, Ph. V. ^{[1
]}

Iatsyuk, I. V. ^{[1
]}

机构：

[1] Natl Univ Sci & Technol MISiS, Moscow 119049, Russia

来源：

GLASS PHYSICS AND CHEMISTRY | 2019年 / 45卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

coatings; magnetron sputtering; heat resistance; oxidation; SILICIDES; COMPOSITE;

D O I：

10.1134/S1087659619040059

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The resistance of Mo40Si40B20 magnetron coatings to high-temperature oxidation in the 1000-1200 degrees C temperature range is investigated. The main phases of the initial coating are high-temperature beta-MoSi2 with a hexagonal lattice and t-MoB. The phase transition of beta-MoSi2 phase into the low-temperature tetragonal alpha-MoSi2 one proceeds at 1000 degrees C. After annealing, the main structural components of the coating are the t-MoSi2, t-Mo5Si3, and t-MoB phases. The size of the formed crystallites' of the t-MoSi2, t-Mo5Si3, and t-MoB phases increases 1.5-fold at 1000-1200 degrees C. The coatings oxidation is studied at 1200 degrees C in the isothermal and non-isothermal modes. After annealing on the surface, a dense oxide SiO2 layer formed and prevented the diffusion of oxygen to the substrate and its subsequent oxidation. In the case of non-isothermal annealing, the protective oxide layer's thickness increases 2.6-3.6-fold compared to that during isothermal holding for the same holding time.

引用

页码：272 / 276

页数：5

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