烧结温度对W-40vol%ZrC性能与组织的影响

详细信息    查看全文 | 推荐本文 |

英文篇名：Effect of Sintering Temperature on Properties and Microstructure of W-40vol%ZrC 作者：李鹏飞 ; 范景莲 ; 章曼 ; 冯康杰 ; 韩勇 ; 田家敏 英文作者：Li Pengfei;Fan Jinglian;Zhang Man;Feng Kangjie;Han Yong;Tian Jiamin;State Key Laboratory for Powder Metallurgy, Central South University; 关键词：SPS ; 硬度 ; 晶粒度 ; 相对密度 ; 抗弯强度 英文关键词：SPS;;hardness;;grain sizes;;relative density;;bending strength 中文刊名：COSE 英文刊名：Rare Metal Materials and Engineering 机构：中南大学粉末冶金国家重点实验室; 出版日期：2019-01-15 出版单位：稀有金属材料与工程 年：2019 期：v.48;No.390 基金：国家自然科学基金(51474242,51404308);; 国家科技部重大专项(2014GB115000) 语种：中文; 页：COSE201901048 页数：6 CN：01 ISSN：61-1154/TG 分类号：339-344

摘要

采用放电等离子烧结(spark plasma sintering, SPS)和常压氢气烧结制备了W-40vol%ZrC的复合材料,研究了烧结温度对其密度、力学性能和微观组织的影响。结果表明,采用SPS烧结能在低于常压氢气烧结200℃下,实现W-40vol%ZrC的高相对密度、高强度和细晶组织。采用SPS烧结在1600℃时的相对密度、硬度和抗弯强度分别达到98.56%、HRA 78.1和501 MPa,W和ZrC的平均晶粒度分别为3和1.5μm;而采用常压氢气烧结在1860℃烧结时达到最优值,其相对密度、硬度和抗弯强度达到98.95%、HRA 77.3和726 MPa,W和ZrC的平均晶粒度分别为10和4.5μm。微观组织分析显示SPS烧结较常压氢气烧结制备W-40vol%ZrC的ZrC相分布更加均匀细小,其能减少材料变形中由于ZrC团聚造成应力集中而引发的脆性断裂。
        W-40vol%ZrC composites were prepared by spark plasma sintering(SPS) and ordinary consolidation sintering separately. Therelative density, mechanical properties and microstructure were studied. The results show that W-40vol%ZrC composites by SPS canachieve high relative density, high strength and fine grains structure even at the temperature 200 °C lower than the ordinary consolidationsintering temperature. The relative density, hardness and bending strength of W-40vol%ZrC composites sintered at 1600 °C are 98.56%,HRA78.1 and 501 MPa, respectively. The average grain sizes of W and ZrC are 3 and 1.5 μm, respectively. O-W40 ZrC has the optimumvalues when sintered at 1860 °C, including the relative density 98.95%, hardness HRA77.3 and bending strength 726 MPa. The averagegrain sizes of W and ZrC are 10 and 4.5 μm, respectively. Compared with ordinary consolidation sintering, the tungsten grains are finer andZrC particles are distributed more homogeneously prepared by spark plasma sintering, and the fine grains have a beneficial effect onfracture process.

引文

[1]Rieth M,Dudarev S L,Vicente S M et al.Journal of Nuclear Materials[J],2013,432:482
    [2]Lv Yongqi(吕永齐),Fan Jinglian(范景莲),Han Yong(韩勇)et al.Rare Metal Materials and Engineering(稀有金属材料与工程)[J],2017,46(6):1704
    [3]Kurishita H,Matsuo S,Arakawa H et al.Materials Science and Engineering A[J],2008,477(1-2):162
    [4]Kurishita H,Matsuo S,Arakawa H et al.Journal of Nuclear Materials[J],2009,386-388:579
    [5]Fan Jinglian,Han Yong,Li Pengfei et al.Journal of Nuclear Materials[J],2014,455:717
    [6]Battabyal M,Sch?ublin R,Sp?tig P et al.Materials Science and Engineering A[J],2012,538:53
    [7]Zhang T Q,Wang Y J,Zhou Y et al.Materials Science and Engineering A[J],2009,512:19
    [8]Zhang T Q,Wang Y J,Zhou Y et al.Materials Science and Engineering A[J],2010,527:4021
    [9]Li Pengfei(李鹏飞),Fan Jinglian(范景莲),Zhang Man(章曼)et al.The Chinese Journal of Nonferrous Metals(中国有色金属学报)[J],2016,26(9):1952
    [10]Li Pengfei(李鹏飞),Fan Jinglian(范景莲),Cheng Huichao(成会朝)et al.Rare Metal Materials and Engineering(稀有金属材料与工程)[J],2016,45(11):2970
    [11]Zhang Shouming,Wang Song,Li Wei et al.Journal of Alloys and Compounds[J],2011,509:8327
    [12]Roosta M,Baharvandi H.Int J Refract Met Hard Mater[J],2010,28:587
    [13]Kim J H,Park C,Lim J et al.Journal of Alloys and Compounds[J],2015,623:282
    [14]Kim J H,Seo M,Kang S.Int J Refract Met Hard Mater[J],2012,35:49
    [15]Huang Peiyun(黄培云).The Principle of Powder Metallurgy,2nd Edn(粉末冶金原理,第2版)[M].Beijing:Metallurgical Industry Press,2008:442
    [16]Zhang T Q,Wang Y J,Zhou Y et al.Int J Refract Met Hard Mater[J],2019,27:14
    [17]German R M,Bourguignon L L,Rabin B H.The Journal of the Minerals,Metals&Materials Society[J],1985,10(8):36