Oxidation of Ultra-High Temperature HfB2-SiC Ceramic Materials in Humid Air Flow

被引：8
|
作者：
Simonenko, E. P. [1 ]
Simonenko, N. P. [1 ]
Mokrushin, A. S. [1 ]
Sevastyanov, V. G. [1 ]
Kuznetsov, N. T. [1 ]
机构：
[1] Russian Acad Sci, Kurnakov Inst Gen & Inorgan Chem, Moscow 119991, Russia
来源：
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2019年 / 64卷 / 14期
基金：
俄罗斯科学基金会;
关键词：
UHTC; ultra-high temperature material; oxidation; humidity; MECHANICAL-PROPERTIES; BEHAVIOR; COMPOSITE; SURFACE; IMPACT;
D O I：
10.1134/S0036023619140109
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The effect of air humidity on the oxidation stability of the ultra-high temperature ceramics HfB2-30 vol % SiC manufactured by reactive hot pressing technique, was studied by thermal analysis. In the air flow with 100% humidity at 23 degrees C (where the water content was 3 vol %), the weight gain due to HfB2 oxidation started at lower temperatures, as well as the weight loss resulting from boron oxide evaporation at temperatures above 1140 degrees C, too. Optical and scanning electron microscopy with local microanalysis confirmed the observation that much less borosilicate glass appeared on the surface and a significantly different microstructure was in the presence of 3 vol % water in air flow.
引用
收藏
页码：1849 / 1853
页数：5
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