Thermal shock behavior of as-sintered and pre-oxidation Zr2Al4C5–20SiC composites
✍ Scribed by Guiqing Chen; Rubing Zhang; Hao Zou
- Publisher
- Elsevier Science
- Year
- 2010
- Weight
- 571 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0261-3069
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✦ Synopsis
A water-quenching technique was adopted to evaluate the thermal shock behavior of as-sintered and pre-oxidation Zr 2 Al 4 C 5 -20 vol.%SiC composites in an air atmosphere. The strength retention of the two kinds of composites was measured after varying temperature (DTc) up to 800 °C. As-sintered Zr 2 Al 4 C 5 -20 vol.%SiC showed rapidly drop in flexural strength above DT of 400 °C. However, the pre-oxidation Zr 2 Al 4 C 5 -20 vol.%SiC composite showed a higher retained strength up to 800 °C, and the critical thermal shock temperature difference (DTc) is as high as 660 °C. The main reasons for a great improvement of thermal shock resistance (TSR) were also discussed and analyzed.