Study on preparation and mechanical property of nanocrystalline NiAl intermetallic

CORC > 兰州化学物理研究所 > 中国科学院兰州化学物理研究所 > 固体润滑国家重点实验室

	Study on preparation and mechanical property of nanocrystalline NiAl intermetallic
	Liu EY(刘二勇)1,2; Jia JH(贾均红)1 ; Bai YP(白亚平)2; Wang WZ(王文珍)1 ; Gao YM(高义民)2; Jia JH(贾均红)
刊名	Materials & Design
	2014
卷号	53 页码:596-601
关键词	NiAl intermetallic Mechanical alloying Nanocrystalline Compressive ductility
ISSN号	0261-3069
通讯作者	贾均红
英文摘要	Nanocrystalline NiAl materials were fabricated using mechanical alloying and hot-pressing sintering technique. The crystal structural and microstructure of milled powders during mechanical alloying, and the microstructure and mechanical properties of bulk NiAl intermetallic were characterized. The results show that B2 ordered nanocrystalline NiAl powders were successfully synthesized by solid-state diffusion via the gradual exothermic reaction mechanism during mechanical alloying. Scanning electron microscope image confirmed that the powder particles were flat and flake shape in the early stage of milling, but changed to a spherical shape with the crystallite size about 30 nm after the milling. After sintering, the crystal structure of nanocrystalline NiAl intermetallic was assigned to B2 order NiAl phase with the average crystallite size about 100 nm. The nanocrystalline NiAl intermetallic exhibited prominent room temperature compressive properties, such as the true ultimate compressive strength and the fracture strain were 2143 MPa and 32.2%, respectively. The appearances of vein-like patterns on the fracture surface of NiAl intermetallic materials indicated that the fracture mechanism could be characterized as ductile fracture. It can be concluded that higher sintering density and nanocrystalline of NiAl intermetallic were benefited for the improvement of mechanical properties.
学科主题	材料科学与物理化学
收录类别	SCI
资助信息	the National Natural Science Foundation of China (Grant No. 51175490;51101166);the “Hundred Talents Program” of Chinese Academy of Sciences (Grant No. KGCX2-YW-804)
语种	英语
WOS记录号	WOS:000326805500075
公开日期	2013-12-03
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/4340]
专题	兰州化学物理研究所_固体润滑国家重点实验室
通讯作者	Jia JH(贾均红)
作者单位	1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Xi An Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
推荐引用方式 GB/T 7714	Liu EY,Jia JH,Bai YP,et al. Study on preparation and mechanical property of nanocrystalline NiAl intermetallic[J]. Materials & Design,2014,53:596-601.
APA	Liu EY,Jia JH,Bai YP,Wang WZ,Gao YM,&贾均红.(2014).Study on preparation and mechanical property of nanocrystalline NiAl intermetallic.Materials & Design,53,596-601.
MLA	Liu EY,et al."Study on preparation and mechanical property of nanocrystalline NiAl intermetallic".Materials & Design 53(2014):596-601.