Oxidation of hot-pressed boron carbide
Oxidation of hot-pressed boron carbide
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热压碳化硼的氧化
DOI：
10.1007/bf01184440
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
É. P. Shevyakova
中科院分区：
文献类型：
--
作者：
L. N. Efimenko;E. V. Lifshits;I. Ostapenko;I. A. Snezhko;É. P. Shevyakova
研究了不同密度的B/sub4/C在800~1200K空气中的氧化动力学。结果表明，B/sub4/C的氧化从900K开始，并按抛物线规律进行。氧化活化能为108 kg/mol。密度对B/sub4/C氧化有很大影响。X射线分析、晶体光学和红外光谱分析表明，在B/sub4/C氧化过程中形成了B/sub2/O/sub3/及其水合物HBO/sub2/和H/sub3/BO/sub3/。
Oxidation kinetics is studied for B/sub 4/C specimens with different density in the air at temperatures of 800-1200 K. It is shown that B/sub 4/C oxidation begins at 900 K and proceeds by the law approaching the parabolic one. The activation energy of oxidation is 108 kg/mol. Density exerts a considerable influence on B/sub 4/C oxidation. The X-ray analyses, crystal optics and IR-spectroscopy methods show formation of boron anhydride B/sub 2/O/sub 3/ and its hydrated forms HBO/sub 2/ and H/sub 3/BO/sub 3/ during B/sub 4/C oxidation with subsequent exposure in the air.