Y2O3/Sn-58Bi复合钎料制备及其性能分析
Preparation and properties of Y2O3/Sn-58Bi composite solders
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摘要: 文中通过粉末冶金法制备了Y2O3/Sn-58Bi复合钎料.结果表明，添加少量Y2O3，对复合钎料熔点影响较小；随着Y2O3质量分数提高，复合钎料的密度和显微维氏硬度先升高后降低；复合钎料的润湿角表现出相反的趋势，随着Y2O3质量分数提高，复合钎料的润湿角先降低后升高.通过测试Sn-58Bi钎料和0.1%（质量分数）Y2O3/Sn-58Bi复合钎料拉伸试样的力学性能发现，添加质量分数为0.1%的Y2O3对复合钎料强度稍有提高，但能明显提高复合钎料的延展性，从而解决传统Sn-58Bi钎料较脆的难题.通过观察钎料拉伸断口发现，添加Y2O3能够细化复合钎料微观组织，使裂纹沿着断裂方向扩展时受到阻碍，抑制了钎料脆性断裂的趋势.Abstract: In the present work, the Y2O3/Sn-58Bi composite solders have been prepared by powder metallurgy method. The melting point of the solder was slightly affected by the addition of few amount of Y2O3. With the increase of the amount of Y2O3, the density and vickers microhardness were firstly increased to the peak value and then decreased with further addition of Y2O3, while the contact angle demonstrated the converse tendency. Compared with Sn-58Bi solder, the strength of the composite solder was slightly increased while the ductility was significantly improved after the addition of 0.1 wt.% Y2O3, solving the brittle problems of the traditional Sn-58Bi solder. Further observation of the fracture surface indicated that the addition of Y2O3 could refine the grain size of the Sn-58Bi and inhabits the propagation of cracks, which improve the ductility of the Sn-58Bi.
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Keywords:
- Yttrium oxide /
- composite solder /
- microstructure /
- mechanical properties
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