Effect of the method of fabricating SiC, Si3N4, and AlN specimens on their resistance to high-temperature oxidation

被引：0

作者：

Korablev, SF ^{[1
]}

Korableva, IR

机构：

[1] Natl Tech Univ, Kiev, Ukraine

[2] Natl Acad Sci Ukraine, Inst Problems Mat Sci, Kiev, Ukraine

来源：

REFRACTORIES AND INDUSTRIAL CERAMICS | 1999年 / 40卷 / 7-8期

关键词：

Boron Nitride; Aluminium Nitride; Scale Resistance; Large Reaction Volume; Polytype Form;

D O I：

10.1007/BF02762583

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 methods of high-pressure sintering (5 GPa) and, far comparison, conventional hot pressing are used for fabricating high-density specimens from SiC, Si3N4, and AlN with the use of activating additives and without them. The high-temperature oxidation is studied by the method of thermogravimetry at 1400 degrees C with a 150-min hold. The introduction of additives in order to activate the sintering increases the resistance of hot-pressed specimens to high-temperature oxidation and does not influence the stability of materials obtained in a high-pressure apparatus. The corrosion resistance of materials sintered under a high pressure turns out to be much higher than that of hot-pressed materials, which is connected with the formation of superfine-grained densely fit oxide films.

引用

页码：338 / 340

页数：3