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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 study the plasticity of Cu-based bulk amorphous alloy and the effect of REE on its mechanical properties, a Cu3O3-xZr42Al8Gdx (x = 0, 2, 4) Alloy round bar. The structure and thermal stability of the alloy were measured by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The effect of adding rare earth element Gd on the mechanical properties and fracture behavior of Cu-based bulk ceramics was studied by testing the compressive properties of the samples and observing the fracture morphology. The results show that the structure of Cu50-xZr42Al8Gdx (x = 0, 2, 4) alloy rods is obviously amorphous, the samples have high thermal stability and good glass forming ability. With the increase of the content of rare earth element Gd, the brittleness of Cu-based bulk is gradually increased. Fracture methods are brittle fracture.