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| 化学沉淀法制备Mo-Ru钎料粉末的组织结构及钎焊性能研究 |
| Microstructure and brazing performance of Mo-Ru alloyed powder prepared by hydrolysis-precipitation method |
| 投稿时间：2023-02-06 |
| DOI： |
| 中文关键词: 金属材料 化学沉淀法 Mo-Ru钎料粉末 粉末粒度 显微组织 钎焊性能 |
| 英文关键词: metal materials chemical hydrolysis precipitation method Mo-Ru powder brazing alloy powdersize microstructure brazing performance |
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| 中文摘要: |
| 采用水合三氯化钌和钼酸铵在红外灯下化学共沉淀反应、通氢还原制备Mo-Ru粉末钎料。利用扫描电镜、能谱仪、X射线衍射及差热分析等技术，研究粉末的形貌、成分、熔化温度、钎料与钼片、多孔钨的钎焊性能。结果表明:用化学沉淀法制备粉末大部分是MoRu化合物颗粒、少量Mo、Ru单质粉末及微量SiO2，粉末粒度D80≤6 μm，熔化后与钼片及阴极多孔钨基体浸润性良好，熔化温度为1959.7~1969.6 ℃，与相图上MoRu共晶钎料的熔化温度接近。 |
| 英文摘要: |
| Mo-Ru alloyed powder was prepared from ruthenium chloride hydrate and ammonium molybdate by using hydrolysis-precipitation method, and then the powder was characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). The particle distribution, melting point and brazing performance were also measured. The results showed Mo-Ru powder was mainly made up of Mo-43Ru alloy but it also contained a small amount of unalloyed Mo and Ru as well as trace SiO2. The size distribution parameter D80 of Mo-Ru powder was determined to be ≤ 6 μm and good wetting was observed on Mo thin piece and W column. The melting temperature was 1959.7 to 1969.6 ℃，close to the value of the eutectic MoRu on the phase diagram. |
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