Title of article
Crack-healing behavior of hot-pressed TZ3Y20A-SiC ceramics
Author/Authors
Xiuping Zhang، نويسنده , , Jia-Hu Ouyang، نويسنده , , Zhan-Guo Liu، نويسنده , , Yu-Jin Wang، نويسنده , , Yu Zhou، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2014
Pages
5
From page
6611
To page
6615
Abstract
Crack healing behavior of hot-pressed TZ3Y20A-SiC ceramics has been investigated by high-temperature oxidation. Semi-elliptical surface cracks with a length of 100 μm have been set on the tensile side of each specimen using a Vickers hardness indenter. Based on flexural strength and observations of crack appearance, the effect of crack healing is finally judged. Cracks on ZrO2(Y2O3)–Al2O3 (TZ3Y20A) ceramics cannot be healed by heat treatment. However, for TZ3Y20A-SiC ceramics, complete crack-healing has been realized by heat treatment at 800 °C, 1000 °C and 1100 °C for 30 h, 10 h and 5 h, respectively. The crack-healing mechanism is attributed to the formation of SiO2 caused by high temperature oxidation during heat treatment.
Keywords
TZ3Y20A ceramics , Crack-healing , D. SiC , High temperature oxidation
Journal title
Ceramics International
Serial Year
2014
Journal title
Ceramics International
Record number
1276344
Link To Document