Oxidation inhibition behaviors of the HfB2-SiC-TaSi2 coating for carbon structural materials at 1700 °C

• DOI: 10.1016/j.corsci.2020.108982
• Publication Date: 2020-09-06T03:49:53Z
• Authors: Menglin Zhang; Xuanru Ren; Hongao Chu; Junshuai Lv; Wei Li; Weiguang Wang; Qingqing Yang; Peizhong Feng
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

Abstract Oxidation inhibition behaviors of the HfB2-SiC-TaSi2 coatings fabricated by spark plasma sintering method were investigated at 1700 ℃. The inerting protection capability and volume expansion effect of TaSi2 is conducive to inhibiting the active oxidation of SiC and loosening of HfB2 at 1700 ℃, 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 TaSi2 and exogenous exfoliation of SiO2 glass 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.