Details

Autor(en) / Beteiligte

• Gui, Kaixuan
• Liu, Fangyu
• Wang, Gang
• Huang, Zhongjia
• Hu, Ping

Titel

Microstructural evolution and performance of carbon fiber-toughened ZrB2 ceramics with SiC or ZrSi2 additive

Ist Teil von

• Journal of advanced ceramics, 2018-12, Vol.7 (4), p.343-351

Ort / Verlag

Beijing: Tsinghua University Press

Erscheinungsjahr

2018

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• ZrB 2 –SiC/ZrSi 2 ceramics containing 30 vol% carbon fiber (C f ) additive were fabricated by hot pressing at low temperature (1500 °C) using submicron ZrB 2 powders, and their microstructural evolution and performance were investigated. The addition of SiC or ZrSi 2 significantly reduced the onset sintering temperature and enhanced the densification of ZrB 2 . ZrB 2 –ZrSi 2 –C f showed poor performance owing to the serious fiber degradation, while the fiber degradation was effectively inhibited in ZrB 2 –SiC–C f resulting in high fracture toughness, substantial fiber pull-out, and non-brittle fracture mode for such material. The critical thermal shock temperature difference of ZrB 2 –SiC–C f was up to 741 °C, significantly higher than those of ZrB 2 –SiC/ZrSi 2 and ZrB 2 –ZrSi 2 –C f . Moreover, this composite displayed a good oxidation resistance at 1500 °C in air.