论文部分内容阅读
本文采用扫描电镜、能谱分析及力学测试等手段,研究了稀土氢化物、稀土氧化物对合金力学性能的影响。结果表明,钼及其合金中加入氢化镧可显著提高塑性,镧在合金中最佳合量为0.5％。主要是由于钼及其合金中加入氢化镧改变了氧的存在状态并细化了晶粒,使合金的塑性改善。钼及其合金中加入三氧化二镧,提高了强度。合金中三氧化二镧的最佳含量为0.5～1.0％。主要是由于加入三氧化二镧后烧结时阻碍晶粒长大,使合金晶粒细化,同时三氧化二镧弥散小质点起着弥散强化作用。
In this paper, the effects of rare earth hydride and rare earth oxide on the mechanical properties of the alloy were studied by scanning electron microscopy, energy spectrum analysis and mechanical testing. The results show that the addition of lanthanum hydride to molybdenum and its alloys can significantly improve the ductility. The optimum amount of lanthanum in the alloy is 0.5%. Mainly due to molybdenum and its alloys by adding lanthanum hydride changed the existence of oxygen and refine the grain, the plasticity of the alloy to improve. Molybdenum and its alloys by adding lanthanum oxide, increased strength. The optimum content of lanthanum trioxide in the alloy is 0.5 to 1.0%. Mainly due to lanthanum oxide after sintering hindered grain growth, the alloy grain refinement, while diffusing small particles of lanthanum oxide play a role in dispersion strengthening.