Microstructure, interface and mechanical property of the DS NiAl/Cr(Mo,Hf) composite | |
Guo, JT; Cui, CY; Chen, YX; Li, DX; Ye, HQ | |
刊名 | INTERMETALLICS
![]() |
2001-04-01 | |
卷号 | 9期号:4页码:287-297 |
关键词 | nickel aluminides based on NiAl brittleness and ductility mechanical properties at high temperatures hot isostatic dressing microstructure |
ISSN号 | 0966-9795 |
通讯作者 | Guo, JT() |
英文摘要 | A NiAl-Cr(Mo) composite containing Hf was directionally solidified under Ar atmosphere in Al2O3-SiO2 ceramic mold by the standard Bridgman method. The microstructure in the as-grown and hot isostatic pressing (HIP) conditions was studied using SEM, HREM and TEM equipped with EDXS. The composite was mainly composed of three phases, i.e. lamellar Cr(Mo), NiAl matrix and semi-continuously distributed Ni2AlHf. The common growth direction of NiAl and Cr(Mo) is < 111 >, and the interface between them was atomically flat with no transition layer. Fine G-phase precipitates were formed in the presence of Si which was from the ceramic shell molds used during the directional solidification. The G-phase precipitates were cuboidal in shape and coherent with NiAl matrix. After the HIPed and aged treatment, the G-phase precipitates completely disappeared and the amount of intercellular Ni2AlHf phase was partially reduced. The mechanical properties were measured by tensile and compressive tests within the temperature range of 25 similar to 1100 degreesC. The BDTT of the HIPed and aged materials is significantly higher than the as-grown composite. The yield stress of the composite was higher than that of many NiAl-based alloys and possible strengthening mechanism were discussed. (C) 2001 Elsevier Science Ltd. All rights reserved. |
WOS研究方向 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
语种 | 英语 |
出版者 | ELSEVIER SCI LTD |
WOS记录号 | WOS:000168566700004 |
内容类型 | 期刊论文 |
源URL | [http://ir.imr.ac.cn/handle/321006/111850] ![]() |
专题 | 金属研究所_中国科学院金属研究所 |
通讯作者 | Guo, JT |
作者单位 | Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China |
推荐引用方式 GB/T 7714 | Guo, JT,Cui, CY,Chen, YX,et al. Microstructure, interface and mechanical property of the DS NiAl/Cr(Mo,Hf) composite[J]. INTERMETALLICS,2001,9(4):287-297. |
APA | Guo, JT,Cui, CY,Chen, YX,Li, DX,&Ye, HQ.(2001).Microstructure, interface and mechanical property of the DS NiAl/Cr(Mo,Hf) composite.INTERMETALLICS,9(4),287-297. |
MLA | Guo, JT,et al."Microstructure, interface and mechanical property of the DS NiAl/Cr(Mo,Hf) composite".INTERMETALLICS 9.4(2001):287-297. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论