ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Several salient factors influencing the formation of reaction-bonded silicon nitride (RBSN) compacts have been studied. These include the effects of mullite and alumina furnace tubes typically employed during “high-purity” nitridation studies, pre-sintering of green silicon compacts, free powder versus compact nitridation, and the influence of metal/metal oxide additions. The latter studies have provided experimental evidence for enhancement due to dissociated nitrogen, and suggest that (1) β-Si3N4 formation does not necessarily require a liquid phase, (2) atomic nitrogen stimulates β-phase formation, and (3) the liquid phase provides an efficient source for volatile silicon, promoting α-Si3N4. These conclusions are consistent with accepted mechanisms for the formation of the two phases.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00595765
