The role of physical factors in mass transport during sintering of coal ashes and deposit deformation near the temperature of glass transformation
1998; Elsevier BV; Volume: 56; Issue: 1-2 Linguagem: Inglês
10.1016/s0378-3820(97)00087-8
ISSN1873-7188
AutoresJan W. Nowok, John P. Hurley, Steven A. Benson,
Tópico(s)Glass properties and applications
ResumoThe role of physical properties of melts such as viscosity, diffusion, and surface/interfacial tensions in sintering and deformation mechanisms of ash deposits above glass-transformation temperature is discussed. The differential thermal analysis (DTA) technique was applied to measure glass transformation and crystallization temperatures. Sintering of selected coal ashes was performed as a function of temperature in air. The mechanical properties of sintered ashes were measured below and above the glass-transformation temperature, Tg. It was found that sintering propensities of amorphous ashes and superplastic-like deformation of deposits above Tg depend on mass transport phenomena in the intergranular liquid phase.
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