Effect of Al-Si alloy powder on properties of corundum-mullite composites

被引：0

作者：

Zhang Zhihui ^{[1
]}

Fu Zhiwei ^{[1
]}

Ruan Guozhi ^{[1
]}

机构：

[1] Shandong Univ Sci & Technol, Sch Mat Sci & Engn, Qingdao 266510, Peoples R China

来源：

RARE METALS | 2011年 / 30卷

关键词：

corundum; mullite; sintering; densification; Al-Si alloy; SILLIMANITE BEACH SAND; MECHANICAL-PROPERTIES; REFRACTORY MATERIALS; ALUMINA; BEHAVIOR; ZRO2;

D O I：

10.1007/s12598-011-0335-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

By means of transient plastic phase process, the corundum-mullite composites were produced using tabular corundum, fused mullite, SiO2 micro powder and Al-Si alloy powder as raw material. The effect of Al-Si alloy powder addition on the sintering, mechanical strength, thermal shock resistance, phase composition and microstructure of the specimens treated at 1550 degrees C for 3 h in an air atmosphere were studied by XRD and SEM analyses. The results indicate that Al-Si alloy powder can lead to plastic shaping in corundum-mullite materials. At the same time, additive of Al-Si alloy powder can greatly improve the sintering, mechanical strength and thermal shock resistance of corundum-mullite composites. This is because that Al-Si alloy powder can melt, oxidize in sintering. The new oxide can react with the matrix to mullite and the in-situ mullite crystals are needle-like that can interleave with others.

引用

页码：511 / 514

页数：4

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