ZrCuAlSi大块非晶合金形成及力学性能

稀有金属材料与工程, 2009, 38(2): 331-334.

ZrCuAlSi大块非晶合金形成及力学性能

张宝庆 ^1, , 范长增 ^2, , 田慧 ^3, , 山圣峰 ^4, , 战再吉 ^5, , 刘日平 ^6, , 王文魁 ^7,

1.燕山大学,河北秦皇岛,066004

2.燕山大学,河北秦皇岛,066004

3.燕山大学,河北秦皇岛,066004

4.燕山大学,河北秦皇岛,066004

5.燕山大学,河北秦皇岛,066004

6.燕山大学,河北秦皇岛,066004

7.燕山大学,河北秦皇岛,066004

基金项目: 国家重点基础研究发展规划(973计划)(2006CB605201) 国家自然科学基金(50325103)

关键词： ZrCu基非晶合金 , 玻璃形成能力 , 热稳定性 , 力学性能

Formation and Mechanical Properties of ZrCuAlSi Bulk Amorphous Alloy

通过铜模铸造法制备(Zr47Cu44Al9)100-xSix(x=0,0.5,1.5,2.5)大块非晶合金.利用差热分析、X射线衍射、显微硬度和室温压缩试验.研究分析添加Si元素对Zr47Cu44Al9合金非晶形成能力、热稳定性及力学性能的影响.结果表明,适量Si的加入能显著提高非晶合金的热稳定性,当Si的加入量为1.5时,合金具有最大的非晶形成能力,其纯非晶试样的临界尺寸由Zr47Cu44Al9的4 mm增大到(Zr47Cu44Al9)98.5Si1.5的6 mm.Si提高非晶形成能力的原因主要是抑制了引起异质形核的CuZr相的形成与析出.力学性能实验显示,显微硬度(Hv)随Si的加入由Zr47Cu44Al9合金的5850MPa增呔到(Zr47Cu44Al9)98.5Si1.5合金的6220 MPa,(Zr47Cu44Al9)98.5Si1.5合金的断裂强度为1862 MPa.

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