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以Mo粉、B粉和石墨为原料,采用粉末冶金的方法成功制备了纯相Mo2BC粉末。通过热重分析仪、拉曼光谱仪、X射线衍射仪(XRD)和场发射扫描电镜(FESEM)等对Mo2BC粉末在100～700℃空气中氧化3 h后的氧化行为进行了研究。结果表明:Mo2BC粉末具有较差的抗氧化性能,初始氧化温度为100℃;300℃以下,Mo2BC粉末表面生成一层MoO3氧化膜,400℃时,Mo2BC粉末发生完全氧化,主要氧化产物为板状的MoO3;当氧化温度升高至700℃,氧化行为以MoO3蒸发为主,最终质量变化逐渐减小;Mo2BC具有独特的力学性能,可以作为耐磨金属材料的增强相,但其抗氧化能力差,应该避免在氧化环境及高于300℃的服役环境下使用。
Abstract：Pure phase Mo2BC powder was successfully prepared by powder metallurgy using Mo powder, B powder, and graphite as raw materials. The oxidation behavior of the Mo2BC powder after 3 h of oxidation in air at 100-700 ℃ was studied using thermogravimetric analyzer, Raman spectrometer, X-ray diffractometer(XRD), and field emission scanning electron microscopy(FESEM). The results show that the Mo2BC powder has poor oxidation resistance, with an initial oxidation temperature of 100 ℃. Below 300 ℃, a layer of MoO3 oxide film is formed on the surface of the Mo2BC powder. At 400 ℃, the Mo2BC powder undergoes complete oxidation, and the main oxidation product is plate-like MoO3. When the oxidation temperature rises to 700 ℃,the oxidation behavior is mainly characterized by MoO3 evaporation, and the final mass change gradually decreases. The Mo2BC has unique mechanical properties and can be used as a reinforcing phase for wear-resistant metal materials, but its oxidation resistance is poor and should be avoided in oxidizing environments and service environments above 300 ℃.
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基本信息:
DOI：10.13289/j.issn.1009-6264.2025-0074
中图分类号:TF123
引用信息:
[1]吴豪琼,郇庆婷,张智源.Mo_2BC粉末的制备及其氧化行为[J].材料热处理学报,2025,46(09):22-28.DOI:10.13289/j.issn.1009-6264.2025-0074.
基金信息:
国家自然科学基金(92266205); 河南省科技攻关项目(242102220122); 河南省高等学校重点科研项目(25B460013); 新乡市机电产品数字化设计与制造重点实验室项目