摘要: |
借助SEM、XRD、显微硬度等分析测试方法,开展了Nb-Si合金与ZrO2、Y2O3、复合铸型界面反应研究。结果表明,Nb-Si合金与ZrO2型壳的界面反应比与Y2O3型壳剧烈,反应层厚度明显增加,且前者O的扩散距离小于后者;Nb-Si合金与ZrO2型壳的界面反应偏向型壳一侧,Nb-Si合金与Y2O3型壳的界面反应偏向基体一侧;复合型壳对Nb-Si合金的稳定最好,是由于复合型壳面层最致密,而且Zr元素减少了O在基体中的扩散距离。 |
关键词: Nb-Si合金;活度;界面反应 |
基金项目: |
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Study of the Interface Reaction Between Nb-Si Alloy and Molds |
Shi Mingxing
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Beijing Xinghang Mechanical and Electrical Equipment Co., Ltd., Beijing 100074
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Abstract: |
The interface reaction experiment between Nb-Si alloy and ZrO2, Y2O3, and compound casting mold was carried out with SEM, XRD and micro hardness testing methods et al. It resulted that the interface reaction between Nb-Si alloy and ZrO2 was more serious than that between Nb- Si alloy and Y2O3, the thickness of reaction layer was obviously increased and the diffusion distance of O is shorter than the latter; the interface reaction between Nb-Si alloy and ZrO2 biased shell side, and that between Nb-Si alloy and Y2O3 shell interface reactions biased substrates side; the stability of Nb-Si alloy is the best under the condition of composite shell, for the composite shell is the densest, and Zr element reduced the diffusion distance of O in the matrix. |
Key words: niobium-silicon alloy;activity;interface reaction |