Sintering mechanisms for crystalline powders: Comparative analysis

Autor: S. I. Averin, V. S. Shustov, Michail I. Alymov
Rok vydání: 2013
Předmět:
Zdroj: International Journal of Self-Propagating High-Temperature Synthesis. 22:234-235
ISSN: 1934-788X
1061-3862
DOI: 10.3103/s1061386213040109
Popis: 234 As is known, the process of sintering plays a key role in structuring of SHS products in post processes [1, 2]. Free sintering is usually treated as the diffusion assisted creeping under the action of surface tension forces [3a–c], while sintering under applied pressure is regarded as diffusion mediated extrusion of voids out of crystals [3c]. It is normally thought that the neck between particles (figure) may grow by mecha nisms schematically indicated in figure. In this communication, we the report on some comparative analysis concerning relative importance of different mechanisms of sintering. According to Frenkel [4], the sintering process can be described in terms of plastic flow. Accordingly, the neck growth (see figure) is associated with the action of capillary forces and given [5] by the expression
Databáze: OpenAIRE
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