EFFECT OF MgAl2O4 ON THE GROWTH OF β-Si3Al3O3N5 PREPARED BY CARBOTHERMAL REDUCTION BY NITRIDING

被引：2

作者：

Flores Valdes, Alfredo ^{[1
]}

Almanza Robles, Jose ^{[1
]}

Torres Torres, Jesus ^{[1
]}

Ochoa Palacios, Rocio ^{[2
]}

Escobedo Bocardo, Jose ^{[1
]}

Cortes Hernandez, Dora ^{[1
]}

Hernandez Garcia, Hector ^{[3
]}

机构：

[1] Ctr Invest & Estudios Avanzados IPN, Unidad Saltillo, Ave Ind Met 1062, Ramos Arizpe 25900, Coahuila, Mexico

[2] Tecnol Nacl Mexico IT Saltillo, Blvd Venustiano Carranza, Saltillo 25000, Coahuila, Mexico

[3] Corp Mexicana Invest Mat, Calle Ciencia & Tecnol 790,Fracc Saltillo 400, Saltillo 25290, Coahuila, Mexico

来源：

CERAMICS-SILIKATY | 2020年 / 64卷 / 03期

关键词：

beta-Si3Al3O3N5; Aluminum dross; Ceramic materials; Carbothermic reduction; BETA-SIALON; CARBON CONTENT; CERAMICS; MICROSTRUCTURE; SI; ALUMINA; POWDERS;

D O I：

10.13168/cs.2020.0016

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The beta-Si3Al3O3N5 compound was experimentally prepared by carbothermal reduction by nitriding using pure SiO2, Al2O3, C, and N2. The effect of MgAl2O4 on the growth of beta-Si3Al3O3N5 was investigated as a function of temperature and molar concentration of MgAl2O4. In this way, it was found that the formation of beta-Si3Al3O3N5 when MgAl2O4 is present in concentrations lower than 13 wt. % occurs. However; when the MgAl2O4 concentration was as high as 25.6 wt. %, the formation of beta-Si3Al3O3N5 compound was not attained and the formation of quaternary magnesium-rich SiAlON phases such as Mg-Si4Al2O3N4 was found. Moreover; the mechanistic steps during the consolidation of SiAlON type structures are presented and discussed.

引用

页码：271 / 277

页数：7

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