摘要
为研究铜基块体非晶的塑性以及稀土元素对其力学性能的影响,采用悬浮熔炼-铜模吸铸法制备了直径为3mm、成分为Cu50-xZr42Al8Gdx(x=0,2,4)的合金圆棒。利用X射线衍射(XRD)和差示扫描量热法(DSC)分别对合金的结构和热稳定性进行了测定。并通过对试样压缩性能测试以及断口形貌的观察,研究了添加稀土元素Gd对Cu基块体非晶的力学性能及断裂行为的影响。结果表明:Cu50-xZr42Al8Gdx(x=0,2,4)合金圆棒的结构为明显的非晶相,试样具有较高的热稳定性和较好的玻璃形成能力。随着稀土元素Gd含量的增加,Cu基块体非晶的脆性逐渐增强。断裂方式均为脆性断裂。
In order to research the plasticity of the Cu-based bulk amorphous and the influence of rare earth element on the mechanical properties of the amorphous,the Cu50-xZr42Al8Gdx（x=0,2,4） alloy rods with 3.0 mm in diameter were prepared by the suspend melting-copper mold suction casting.The structure and glass forming ability of the alloys were analyzed by X-ray diffraction（XRD） and differential scanning calorimetry（DSC）,respectively.Subsequently,through the compression performance testing and the fracture morphology observation,the effect of rare earth element Gd on the mechanical performance and the fracture behavior of the samples were investigated.The results show that the structure of the rods is composed of amorphous phase.The samples possess larger thermal stability and good glass formation ability.With the increase of Gd content,the brittleness of the samples is enhanced gradually.Fracture mode presents brittle fracture.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2012年第11期1903-1906,共4页
Rare Metal Materials and Engineering
基金
National Natural Science Foundation of China(50824001)
关键词
Cu基块体非晶
玻璃形成能力
压缩性能
断裂行为
Cu-based bulk metallic glass
glass forming ability
compression performance
fracture behavior
