High-performance flash joining of MgAl2O4 transparent ceramics

被引：14

作者：

Li, Tianyu ^{[1
,2
]}

Liu, Yan ^{[1
,2
,3
]}

Li, Gui ^{[1
]}

Zhou, Hao ^{[1
,2
]}

Zhang, Keying ^{[1
,2
]}

Yang, Jinjing ^{[1
]}

Liu, Xuejian ^{[1
]}

Huang, Zhengren ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine M, Shanghai 200050, Peoples R China

[2] Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Shanghai Inst Ceram, 588 Heshuo Rd, Shanghai, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2022年 / 48卷 / 21期

基金：

中国国家自然科学基金;

关键词：

Transparent ceramics; Flash joining; Transmittance; ELECTRIC-FIELD; DIFFUSION; ZIRCONIA;

D O I：

10.1016/j.ceramint.2022.07.336

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 MgAl2O4 transparent ceramic was firstly flash joined in 3 min at 1500 degrees C by applying direct current (DC) electric field. Three-point flexural strength of the joints reached approximately 256.0 MPa, which was even 114.7% of that of the parent material. Compared with parent transparent ceramics, transmittance loss of the MgAl2O4/MgAl2O4 joints in band of visual light and mid-infrared was only 1.5% and 4.5%, respectively. A possible mechanism of flash joining was proposed. The applied DC electric field induces numerous charged defects in the sample and superplastic deformation of the ceramic. The defects generated at the pores of the joining interface migrate directionally under the action of the DC electric field, which accelerates the diffusion rate of substances and enables the samples to be quickly jointed at a lower temperature.

引用

页码：32561 / 32565

页数：5

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