铒元素对锆基合金的非晶形成能力及力学性能的影响  

Effect of Er on Amorphous Forming Ability and Mechanical Properties of Zr-based Alloys

作　　者：付小强 寇生中[1,2] 李晓诚 丁瑞鲜[1,2] 李春燕 李春玲[3] Fu Xiaoqiang;Kou Shengzhong;Li Xiaocheng;Ding Ruixian;Li Chunyan;Li Chunling(School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China;School of Mechanical and Electrical Engineering,Lanzhou University of Technology,Lanzhou 730050)

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [3]兰州理工大学机电工程学院,甘肃兰州730050

出　　处：《稀有金属材料与工程》2022年第9期3159-3165,共7页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China (51971103, 51861021);Key R&D Program of Gansu Province (20YF8GA052)。

摘　　要：以海绵锆为原料,采用水冷铜坩埚熔炼和铜模吸铸法制备了直径为3 mm、成分为(Zr_(0.55)Cu_(0.3)Al_(0.1)Ni_(0.05))_(100-x)Er_(x)(x=0,0.5,1,2,3,4,5)的锆基块体合金,通过对比不同铒含量海绵锆基合金的组织结构与性能,研究了铒元素对其非晶形成能力、热稳定性和力学性能的影响。结果表明:以海绵锆为原料时,锆基合金的非晶形成能力和力学性能明显下降。x=0时,无法制备成锆基非晶合金;添加Er元素后,海绵锆基合金的非晶形成能力和力学性能显著提高,具有非晶态结构;x=2时,海绵锆基非晶合金的力学性能最优,抗压强度σ_(bc)为 2142.5 MPa,室温下塑性应变 ε_(p)为 10.01%。与高纯锆制备的同直径(Zr_(0.55)Cu_(0.3)Al_(0.1)Ni_(0.05))_(98)Er_(2)非晶合金相比,其抗压强度恢复97.63%,室温塑性恢复 69.95%。添加铒元素有利于改善和提高海绵锆基合金的非晶形成能力和力学性能,为低成本制备锆基非晶合金提供一种新思路。The(Zr_(0.55)Cu_(0.3)Al_(0.1)Ni_(0.05))_(100-x)Er_(x)(x=0,0.5,1,2,3,4,5) Zr-based bulk alloy with diameter of 3 mm was prepared by watercooled copper crucible smelting and copper mold suction casting using zirconium sponge as raw material.By comparing the microstructure and mechanical properties of sponge Zr-based alloy with different Er contents,the influence of Er on the amorphous forming ability,thermal stability,and mechanical properties of Zr-based bulk alloy was studied.Results show that when the zirconium sponge is used as the raw material,the amorphous formation ability and mechanical properties of sponge Zr-based alloy are obviously reduced.The sponge Zr-based amorphous alloy cannot be prepared when x=0.After adding Er element,the amorphous forming ability and mechanical properties of the sponge Zr-based alloy with the amorphous structure are improved obviously.The optimal mechanical properties of the sponge Zr-based alloy are achieved when x=2:the compressive strength σ_(bc)is 2142.5 MPa and the plastic strain ε_(p) is 10.01% at room temperature.Compared with the amorphous(Zr_(0.55)Cu_(0.3)Al_(0.1)Ni_(0.05))_(98)Er_(2) alloy with the diameter of 3 mm prepared from high-purity Zr,the compressive strength and plasticity at room temperature of the sponge Zr-based alloy recovers by 97.63% and 69.95%,respectively.The Er addition is beneficial to improve the amorphous forming ability and mechanical properties of sponge Zr-based alloy,which also provides a new approach for low-cost preparation of Zr-based amorphous alloy.

关 键 词：海绵锆 非晶合金 铒元素 非晶成形能力 力学性能 

分 类 号：TG139.8[一般工业技术—材料科学与工程]