徐流杰,肖方闹,周玉成,潘昆明,魏世忠

• 1:河南科技大学材料科学与工程学院
• 2:河南科技大学河南省耐磨材料工程技术研究中心

摘要(Abstract)：

采用共沸蒸馏法结合粉末冶金法制备了氧化钇稳定立方晶型氧化锆增强钨基合金(W-3.0 mass%YSCZ)。利用XRD、SEM、EDS、TEM等检测手段对合金制备过程中不同阶段材料组织、形貌及微观结构进行了分析与表征,测定了复合钨粉的粒度、钨合金的密度、显微硬度、磨损性能及动态压缩性能。结果表明:p H值对前驱体粉体的粒度有显著影响,p H=2的初始溶液制得的前驱体粉体粒径细小,随着初始溶液的p H值增大,复合粉末粒径逐渐增加;p H=2的初始溶液制得的前驱体粉经550℃×4 h煅烧后得到粒径为40~60 nm煅烧粉体,再经750℃×2 h+900℃×4 h氢气还原后得到尺寸为35~50 nm的钨与ZrO_2-Y2O3构成的近球形纳米级复合粉末;制得的钨合金中的ZrO_2为立方晶型,表明常温下Y2O3对ZrO_2晶型起到了稳定作用;ZrO_2-Y_2O_3颗粒对钨晶粒具有明显的细化作用,获得的钨晶粒粒径为3~6μm;钨基合金相对密度达90.9%,抗压强度达到1009 MPa,耐磨性较纯钨提高了约18.7%。

关键词(KeyWords)： 钨合金;ZrO2掺杂;Y2O3稳定;抗压强度

Abstract:

Keywords:

基金项目(Foundation): 长江学者和创新团队发展计划(IRT1234)

作者(Author): 徐流杰,肖方闹,周玉成,潘昆明,魏世忠

DOI: 10.13289/j.issn.1009-6264.2016.04.008

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