The influence of pyrolysis temperature on the oxidation resistance of carbon-rich SiCN ceramics derived from reaction of silazanes with acrylonitrile
The influence of pyrolysis temperature on the oxidation resistance of carbon-rich SiCN ceramics derived from reaction of silazanes with acrylonitrile
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DOI：
10.1016/j.jeurceramsoc.2021.01.042
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发表时间：
2021-01
影响因子：
5.7
通讯作者：
Luiz Fernando Belchior Ribeiro;André Vinícius Andrade Bezerra;Christel Gervais;Samuel Bernard;Ricardo Antonio Francisco Machado;Guenter Motz
中科院分区：
文献类型：
--
作者：
Luiz Fernando Belchior Ribeiro;André Vinícius Andrade Bezerra;Christel Gervais;Samuel Bernard;Ricardo Antonio Francisco Machado;Guenter Motz
评估了热解温度对由丙烯腈与市售低聚硅氮烷（HTT1800）反应以及随后在氮气气氛中热解得到的富碳SiCN陶瓷的抗氧化性的影响。氧化行为的研究表明，最终热解温度对所开发的 SiCN/C 纳米复合材料的抗氧化性起着重要作用。提高热解温度促进游离碳相的有序化，因此，抗氧化性得到改善。然而，在 1500 °C 退火期间开始相分离会稍微降低抗氧化 Si3N4 相提供的保护效果。
The influence of pyrolysis temperature on the oxidation resistance of carbon-rich SiCN ceramics derived from reaction of acrylonitrile with a commercially available oligosilazane (HTT1800) and its subsequent pyrolysis in nitrogen atmosphere was evaluated. The investigation of the oxidation behavior reveals that the final pyrolysis temperature plays an important role in the oxidation resistance of the developed SiCN/C nanocomposites. Increasing the pyrolysis temperature promotes an ordering of the free-carbon phase and consequently, an improvement of the oxidation resistance is noticed. However, starting phase separation during annealing at 1500 °C reduces slightly the protection effect provided by the oxidation resistant Si3N4phase.