OXIDATION BEHAVIOR OF MONOLITHIC TIN AND TIN DISPERSED IN CERAMIC MATRICES

被引:28
作者
GOGOTSI, YG
PORZ, F
DRANSFIELD, G
机构
[1] UNIV KARLSRUHE,INST KERAM MASCHINENBAU,W-7500 KARLSRUHE 1,GERMANY
[2] TIOXIDE GRP LTD,BILLINGHAM TS23 1PS,CLEVELAND,ENGLAND
来源
OXIDATION OF METALS | 1993年 / 39卷 / 1-2期
关键词
OXIDATION; TITANIUM NITRIDE; CERAMIC-MATRIX COMPOSITES; RUTILE; OXIDE LAYERS;
D O I
10.1007/BF00666611
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
The mechanism and kinetics of high-temperature (up to 1500-degrees-C) oxidation of pressureless-sintered TiN and hot-pressed silicon nitride-TiN, alumina-TiN, aluminum nitride-TiN, and AlON-TiN ceramic composites were studied in air under isothermal and nonisothermal conditions. Analysis of the oxidation products revealed the formation of rutile in the temperature range from 600 to 1000-degrees-C An interaction of TiO2 with the matrix and/or its oxidation products was observed at higher temperatures. The oxidation of TiN-containing composites shows different behavior depending on the temperature. The presence of fine isolated inclusions of TiN (< 30 mass %) in the silicon-nitride matrix does not change the mass gain during oxidation or increases it only slightly, as compared with a TiN-free material. For materials containing a continuous skeleton of TiN (> 30 mass %) a noticeable increase of the oxidation rate was observed.
引用
收藏
页码:69 / 91
页数:23
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