Microstructure Evolution and Oxidation Behavior of Hf Modified Mo-Si-B Alloys

• DOI: 10.2139/ssrn.4629077
• Publication Date: 2023-11-10T03:21:41Z
• Authors: Shuo Sun; Wen Zhang; Xiaohui Lin; Yanchao Li; Xuanqiao Gao; Jing Liang; Wei Zai

The influence of microstructure evolution and oxidation behaviors Hf modified Mo-12Si-12B alloys were studied at 1300 °C. Four Mo-Si-B-Hf containing different content produced, all the included α-Mo, Mo5SiB2(T2), Mo3Si phases, while HfB2 phase appeared with high Hf. results a detailed examination theoretical analysis revealed that formation SiO2-HfO2-HfSiO4 layer can effectively decrease oxygen diffusion coefficient thus improved resistance, excessive addition reduced fluidity borosilicate increased number defects, which leaded to serious deterioration resistance.