Oxidation inhibition behaviors of the HfB2-SiC-TaSi2 coating for carbon structural materials at 1700 degrees C
Oxidation inhibition behaviors of the HfB2-SiC-TaSi2 coating for carbon structural materials at 1700 degrees C
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碳结构材料HfB2-SiC-TaSi2涂层在1700℃下的氧化抑制行为
DOI：
10.1016/j.corsci.2020.108982
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发表时间：
2020
影响因子：
8.3
通讯作者：
Feng Peizhong
中科院分区：
文献类型：
--
作者：
Zhang Menglin;Ren Xuanru;Chu Hongao;Lv Junshuai;Li Wei;Wang Weiguang;Yang Qingqing;Feng Peizhong
研究了放电等离子烧结法制备的HfB2-SiC-TaSi2涂层在1700 ℃下的氧化抑制行为。 TaSi2的惰性保护能力和体积膨胀作用有利于抑制1700℃下SiC的活性氧化和HfB2的疏松，增强涂层的结构封闭能力。 TaSi2的自体分离和SiO2玻璃的外源剥离加速了双过渡金属Hf/Ta氧化物纳米晶颗粒的分散，形成Hf-Ta-B-Si-O复合玻璃层，有利于降低复合玻璃层的氧透过率，提高涂层的氧化防护效率。
Oxidation inhibition behaviors of the HfB2-SiC-TaSi2coatings fabricated by spark plasma sintering method were investigated at 1700 °C. The inerting protection capability and volume expansion effect of TaSi2is conducive to inhibiting the active oxidation of SiC and loosening of HfB2at 1700 °C, enhancing the structural blocking ability of the coatings. The dispersion of dual transition metal Hf/Ta-oxide nanocrystalline particles were accelerated by the autogenous separation of TaSi2and exogenous exfoliation of SiO2glass to form the Hf-Ta-B-Si-O compound glass layer, which conduce to decrease oxygen permeability of the compound glass layers and enhance oxidation protection efficiency of the coatings.