Microstructural Development of Ca-α-Sialon under Different Processing Conditions

Abstract

Abstract: Elongated α-Sialon grains were produced in pressureless sintered Ca-α-Sialon ceramics with the composition Ca_1.8Si_6.6Al_5.4O_1.8N_14.2.
The effect of the processing conditions, such as heating rate and middle dwelling, on the microstructure of the material was studied by SEM, along
with the discussion on the nucleation and growth mechanism of the elongated α-Sialon grains. It was found that elongated α-Sialon grains
are easier to develop with fewer nuclei and abundant liquid phase during sintering, while the formation and redissolution of the middle phase
(gehlenite) is directly related to nuclei number and quantity of the liquid phase.

Key words: Ca, elongated α-Sialon grains, microstructure

CLC Number:

TB323

LI Ya-Wen,WANG Pei-Ling,YAN Dong-Sheng,CHENG Yi-Bing. Microstructural Development of Ca-α-Sialon under Different Processing Conditions[J]. Journal of Inorganic Materials.

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Microstructural Development of Ca-α-Sialon under Different Processing Conditions

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