摘要
采用挤压成形工艺制备新型纯铜/Cu40Zr44Ag8Al8非晶复合板材。通过光学显微镜(OM)、X射线衍射(XRD)、维氏硬度(HV)和扫描电子显微镜(SEM)研究复合板材芯部非晶尺寸与硬度的分布及复合板材的界面性能;并对比纯铜板材和复合板材的三点弯曲性能。结果表明:通过挤压成形工艺可以使复合板材获得良好的界面结合,界面元素梯度分布表明界面宽度约为2.15μm。挤压开始阶段,复合板材由单一纯铜组成;随后芯部开始出现非晶,且在距离头部12 mm处非晶尺寸达到最大,其长度和宽度分别为2.785和1.481 mm;随着挤压的继续进行,芯部的非晶尺寸逐渐减小并趋于稳定,稳定阶段长度和宽度的平均尺寸分别为2.269和0.797 mm。X射线衍射和维氏硬度结果表明,芯部非晶在复合挤压过程中没有发生晶化现象。三点弯曲试验表明,复合板材的弯曲强度比纯铜的大,其弯曲断裂强度为377.4 MPa。
The novel pure copper/Cu40Zr44Ag8A18 amorphous composite plate was fabricated by the extrusion process. The core and interface of composite plate were characterized by optical microscopy （OM）, X-ray diffractometry （XRD）, microhardness （HV） and scanning electron microscopy （SEM）. The bending properties of pure copper plate and composite plate were investigated by three point bending test. The results indicate that a good bonding interface of composite plate is obtained with an interface width of about 2.15 μm through EDS analysis. The composite plate is composed of single pure copper at the start of extrusion. Then, the core begins to appear amorphous, and reaches the maximum value at the distance of about 12 mm to head of plate. The length and width are 2.785 and 1.481 mm, respectively. The dimension of BMG core reduces gradually and then becomes stable. The average size of the length and width are 2.269 and 0.797 mm, respectively. The crystallization of amorphous in the core during extrusion does not occur through the analysis of XRD and microhardness. Three point bending test show that the composite plate exhibits a larger bending flexural strength （of about 377.4 MPa） than the pure copper.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2012年第10期2855-2861,共7页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(51001058
50965015)
国家科技支撑计划项目(2011BAE22B02)
江西省铜钨新材料重点实验室开放基金资助项目(2010-WT-08)
江西省国际合作项目(2010EHA02000)
江西省自然科学基金资助项目(2010GQC0135)
关键词
非晶合金
复合材料
热塑性成形
弯曲性能
amorphous alloy
composite
thermoplastic forming
bending property
