Direct nitridation of molten Al(Mg,Si) alloy to AlN

被引：16

作者：

Haibo, J

Chen, K

Heping, Z

Agathopoulos, S

Fabrichnaya, O

Ferreira, JMF ^{[1
]}

机构：

[1] Univ Aveiro, Dept Ceram & Glass Engn, CICECO, P-3810193 Aveiro, Portugal

[2] Tsing Hua Univ, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

[3] Max Planck Inst Met Res, D-70569 Stuttgart, Germany

来源：

JOURNAL OF CRYSTAL GROWTH | 2005年 / 281卷 / 2-4期

关键词：

capillarity; crystal morphology; mass transfer; thermodynamics; growth from melt; alloys; nitrides;

D O I：

10.1016/j.jcrysgro.2005.04.024

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The growth of AIN rod-like crystals, successfully produced via direct nitridation of Al-alloy doped with 5 wt% Mg and 2 wt% Si at 1273 K is predominantly based on capillary niass-transfer phenomena, which occur through a network of micro-channels developed in the empty space among the AIN columnar crystals as well as the hollows inside these crystals. The diffusion of N-2 in the liquid alloy is the rate-determining step of the process. Mg and Mg3N, resulting after nitridation maintain a very low partial pressure of oxygen during the entire process and favour the formation of AIN. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：639 / 645

页数：7

共 30 条

[1] PROPERTIES AND MICROSTRUCTURES OF LANXIDE AL2O3-AL CERAMIC COMPOSITE-MATERIALS [J].