熔炼气氛中的氧含量对锆基非晶合金非晶形成能力及力学性能的影响  

Effects of Oxygen Content in Furnace Atmosphere on the Glass Forming Ability and Mechanical Properties of Zr-Based Bulk Metallic Glass

作　　者：邢秋玮[1] 寇生中[1,2] 李春燕[1] 赵燕春[1] 徐冲[1] 蒋维科[1] 李超[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050 [2]兰州理工大学有色金属合金及加工教育部重点实验室,甘肃兰州730050

出　　处：《铸造》2013年第5期380-383,共4页Foundry

基　　金：国家自然科学基金(50961008;51061008);973计划前期研究专项(2011CB612203)

摘　　要：在氧气浓度(体积分数)分别为4.19%、0.838%、0.168%的熔炼气氛下熔炼成分为Zr63.36Cu14.52Ni10.12Al12的母合金,采用铜型吸铸法将其制备成非晶合金棒状试样,研究了合金的非晶形成能力与压缩力学性能的变化规律。结果表明:随着熔炼气氛中氧含量的减少,合金的晶化温度由653.7 K下降至645.1 K,过冷液相区宽度由85.8 K上升至94.3 K;非晶合金的最大抗压强度由1.82 GPa上升至1.94 GPa,塑性形变由2.29%提升至18.99%;随着氧含量的降低,Zr63.36Cu14.52Ni10.12Al12合金的非晶形成能力上升,力学性能得到提高。Zr63.36Cu14.52Ni10.2Al12 quaternary alloy were melting, when the oxygen content were 4.19%, 0.838%, 0.168% in furnace atmosphere, respectively. The alloy rods were prepared with the ingot by copper mold with suction casting method. The variation of glass forming ability and compressive mechanical property of the alloy were investigated. It indicates that with increasing oxygen content during this process, crystallization temperature of alloy decreased from 653.7 K to 645.1 K, the width of supercooled liquid region increased from 85.8 K to 94.3 K, the maximum compressive strength increased from 1.82 GPa to 1.94 GPa, the plastic strain increased from 2.29% to 18.99%. With decreasing oxygen content, glass forming ability of Zr63.36Cu14.52Ni10.2Al12 alloy is improved and mechanical property of the alloy increases.

关 键 词：块体非晶合金 氧含量 非晶形成能力 热稳定性 力学性能 

分 类 号：TG139.8[一般工业技术—材料科学与工程]