Joining of Al2O3 by epitaxial growth of aluminum borate whiskers for high-temperature applications

被引：16

作者：

Wang, Yifeng ^{[1
]}

Feng, Jicai ^{[1
]}

Wang, Zhijie ^{[1
]}

Song, Xiaoguo ^{[1
]}

Cao, Jian ^{[1
]}

机构：

[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China

来源：

MATERIALS LETTERS | 2016年 / 163卷

基金：

中国国家自然科学基金;

关键词：

Alumina; Microstructure; Aluminum borate whisker; Epitaxial growth; Flexural strength; AL4B2O9; NANOWHISKERS; FABRICATION; CERAMICS;

D O I：

10.1016/j.matlet.2015.10.079

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Alumina ceramics were directly bonded for high-temperature applications by epitaxial growth of aluminum borate whiskers in air. The Al2O3/whisker/Al2O3 joints were characterized via scanning electron microscopy, X-ray diffraction and transmission electron microscopy. The microstructural observations showed that the Al18B4O33 whiskers along the [001] crystallographic direction grew across the seam and thereby achieving the joining of alumina substrates. Both of whiskers diameter and density of joints increased with the increase of bonding temperatures. Three-point bending results showed that the maximum strength of the joints tested at 800 degrees C was 27 MPa. The possible mechanism of the bonding process was discussed as well. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：231 / 235

页数：5

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