Mn and Si are common elements in steel and have an important influence on the performance of steel. To analyze the intermetallic compounds formed in tin-base solder welding process, the Mn-Si-Sn alloys were prepared and annealed at 500 °C for 30 days. The phase equilibria in the Mn-Si-Sn system at 500 °C were studied by electron microscopy equipped with energy-dispersive spectrometry and x-ray diffraction. 12 three-phase regions were well determined in the Mn-Si-Sn system at 500 °C, and no ternary compound was found. The binary compound Mn5Si2, which is controversial in the literature, was not observed in the present study. Mn2−xSn (Mn1.8Sn) and Mn3Sn2 phases were detected by XRD rather than the Mn2Sn phase in this work. The solubility of Si in Mn3Sn, Mn2−xSn, Mn3Sn2, and MnSn2 was measured to be 0.7, 1.2, 1.2, and 0.4 at.%, respectively. And the Sn solubility in R-Mn6Si, υ-Mn9Si2, Mn3Si, MnSi, Mn11Si19 at 500 °C is about 0.9, 0.5, 0.3, 0.3 and 0.2 at.%, respectively.

中文翻译：

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Mn-Si-Sn 三元体系的 500 °C 等温截面

Mn和Si是钢中常见的元素，对钢的性能有重要影响。为了分析锡基焊料焊接过程中形成的金属间化合物，制备了 Mn-Si-Sn 合金并在 500 °C 下退火 30 天。通过配备能量色散光谱和 X 射线衍射的电子显微镜研究了 500°C 下 Mn-Si-Sn 系统中的相平衡。Mn-Si-Sn体系在500°C时很好地确定了12个三相区，未发现三元化合物。在本研究中未观察到文献中存在争议的二元化合物 Mn5Si2。在这项工作中，Mn2-xSn (Mn1.8Sn) 和 Mn3Sn2 相是由 XRD 检测到的，而不是 Mn2Sn 相。测得 Si 在 Mn3Sn、Mn2-xSn、Mn3Sn2 和 MnSn2 中的溶解度分别为 0.7、1.2、1.2 和 0.4 at.%。