Effect of the Surface Relief of HfB2-SiC Ceramic Materials on Their High-Temperature Oxidation

被引：6
作者：
Simonenko, E. P. [1 ]
Simonenko, N. P. [1 ]
Gordeev, A. N. [2 ]
Kolesnikov, A. F. [2 ]
Lysenkov, A. S. [3 ]
Sevastyanov, V. G. [1 ]
Kuznetsov, N. T. [1 ]
机构：
[1] Russian Acad Sci, Kurnakov Inst Gen & Inorgan Chem, Moscow 119991, Russia
[2] Russian Acad Sci, Ishlinskii Inst Problems Mech, Moscow 119526, Russia
[3] Russian Acad Sci, Baikov Inst Met & Mat Sci, Moscow 119526, Russia
来源：
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2019年 / 64卷 / 13期
基金：
俄罗斯基础研究基金会;
关键词：
UHTC; ultra-high-temperature material; high-enthalpy air flow; induction plasmatron; DISSOCIATED AIR-FLOW; BEHAVIOR; COMPOSITES; DESIGN; ZRB2; ZRB2-SIC-ZRC; SAMPLES; IMPACT;
D O I：
10.1134/S0036023619130084
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Samples of an ultra-high-temperature HfB2-30 vol % SiC ceramic material with an SiC crystallite size of 50 nm have been fabricated by hot pressing of an HfB2-(SiO2-C) composite powder synthesized through a sol-gel route. It has been found that the selected hot-pressing conditions (1800 degrees C, 15 min, 30 MPa) ensure complete conversion of silica to silicon carbide and afford a material with a relative density of 96.9%. The effect of a relief applied to the sample surface in the form of ring grooves with a depth of <0.5 mm on the oxidation of the material exposed to a subsonic dissociated air flow-temperature distribution over the surface, elemental and phase composition, and microstructure-has been studied using a high-frequency induction plasmatron.
引用
收藏
页码：1681 / 1686
页数：6
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