摘要:

AbstractA method is described for preparing silicon nitride bodies of almost theoretical density. Silicon nitride powder is hot pressed with a small proportion of catalyst, preferably magnesium oxide or nitride, at 1850°C. The bodies have very high flexural strength up to high temperatures, and preliminary measurements of creep rate and thermal shock-resistance indicate that dense silicon nitride should be a suitable material from which to make components required to operate under high stress at temperatures up to∼1200°C.

ISSN:0032-5899    

DOI:10.1179/pom.1961.4.8.011

出版商:Taylor&Francis    

年代:1961

数据来源: Taylor

摘要:

AbstractThe paper describes experiments to establish the conditions under whichα- andβ-silicon nitride may be produced independently or in varying proportions. It also suggests a method for varying the properties of silicon nitride by incorporating a dispersion or continuous network of other elements and compounds.

ISSN:0032-5899    

DOI:10.1179/pom.1961.4.8.012

出版商:Taylor&Francis    

年代:1961

数据来源: Taylor

摘要:

AbstractThe mechanical properties and the thermal-shock and thermal-fatigue characteristics of three reaction-sintered (density 1·9-2·6 g/ml) and one hot-pressed (density 3·00-3·18 g/ml) samples of silicon nitride showed significant differences according to composition and method of manufacture. The resistance to creep (at 1000-1200°C) and to thermal fatigue (at 1000°C), particularly of the dense grades, can be considerably superior to that of creep-resistant alloys. However, the appreciable variation in performance of all grades indicates that further development of the manufacturing technique is necessary to ensure consistent behaviour.

ISSN:0032-5899    

DOI:10.1179/pom.1961.4.8.013

出版商:Taylor&Francis    

年代:1961

数据来源: Taylor

摘要:

AbstractThe paper summarizes the known physical, mechanical, and chemical properties of silicon nitride. These are compared with the properties of several ceramics and other materials in common use, and it is shown how the combination of certain properties in silicon nitride make it an ideal material for six general types of application. For example, it is shown how the combination of thermal shock-resistance and electrical resistivity can be used to develop high-temperature electrical insulators.

ISSN:0032-5899    

DOI:10.1179/pom.1961.4.8.014

出版商:Taylor&Francis    

年代:1961

数据来源: Taylor

ISSN:0032-5899    

DOI:10.1179/pom.1961.4.8.015

出版商:Taylor&Francis    

年代:1961

数据来源: Taylor