学术
摘 要:
采用机械合金化（MA）＋热压工艺路线来制备Cr-NbCr2复合材料。研究了Cr-NbCh复合材料的组织和性能。结果表明，MA＋热压获得的Cr-NbCr2复合材料组织均匀，晶粒尺寸达到微／纳米级，致密度达到98.3％，抗压强度为2044MPa，塑性应变为7．26％，比熔铸法制备的Cr-NbCr2复合材料及单一Laves相（NbCr2）的塑性都有很大提高。充分体现了MA＋热压复合工艺对第二相增韧的效果。[著者文摘]
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文章出处:
《热加工工艺》-2007年36卷4期,51 -4-6,51页
栏目信息:
文献标识码:
A
文章编号:
1001-3814（2007）04-0004-03
Study on Microstructure and Properties of Cr-NbCr2 Composite Material Prepared by Compound Method of Mechanical Alloying ＋ Hot Pressing
HU Ping ,LU Shi-qiang, XIAO Xuan, HUANG Ming-gang （Department of Material Science and Engineering, Nanchang Institute of Aeronautical Technology, Nanchang 330063 ,China）
Abstract:
Cr-NbCr2 composite material was prepared by mechanical alloying （MA） ＋ hot pressing. Its mierostructure and properties were investigated. The results show that the microstructure of Cr-NbCr2 composite material is homogeneous and the grain size is up to the grade of micron/nano-metre.Moreover, the relative density of the material is 98.3% , compressive strength is 2 044 MPa and plasticity strain is 7.26%. Compared with Cr-NbCr2 composite material prepared by arc-melting and simple Laves phase NbCr2, its plasticity increases greatly, the effect of MA ＋ hot pressing compound process of secondary phase toughening has been fully realized.[著者文摘]
Key words:
mechanical alloying; secondary phase toughening; Cr-NbCr2; microstructure and properties
基金资助:
国家自然科学基金资助项目（50474009）;航空科学基金资助项目（05G56003）;江西省自然科学基金资助项目（0350045）;江西省材料科学与工程研究中心基金资助项目（ZX200401001）
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