Ultra-high temperature oxidation resistance of ZrB2-20SiC coating with TaSi2 addition on siliconized graphite

Ultra-high temperature oxidation resistance of ZrB2-20SiC coating with TaSi2 addition on siliconized graphite
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硅化石墨上添加TaSi2的ZrB2-20SiC涂层的超高温抗氧化性能

DOI:
10.1016/j.ceramint.2019.05.030
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发表时间:
2019-08
影响因子:
5.2
通讯作者:
Meishuan Li
Meishuan Li
中科院分区:
材料科学1区
文献类型:
--
作者:
Yan Ren;Yuhai Qian;Jingjun Xu;Jun Zuo;Meishuan Li

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采用料浆法在硅化石墨表面制备了ZrB 2 - 20 SiC和ZrB 2 - 20 SiC-10 TaSi 2(体积分数)涂层。通过感应加热方法将所制备的涂层在1700 °C下在空气中氧化30 min。基于涂层的消耗来评价涂层的抗氧化性。TaSi 2的加入显著提高了ZrB 2 - 20 SiC涂层的抗超高温氧化性能,这是由于在涂层中形成了具有较低透氧性的Ta溶解氧化物层。
ZrB2-20SiC and ZrB2-20SiC-10TaSi2(volume fraction) coatings were prepared on siliconized graphite by slurry method. The as-prepared coatings were oxidized at 1700 °C in air for 30 min by induction heating method. The oxidation resistance of the coatings was evaluated based on the consumption of the coating. The addition of TaSi2significantly improved the ultra-high temperature oxidation resistance of ZrB2-20SiC coating, due to the formation of a Ta dissolved oxide layer with much lower oxygen permeability.
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