Synthesis and characteristics of Ti-Fe nanoparticles by hydrogen   plasma-metal reaction

doi:10.1016/j.intermet.2003.08.004

CORC > 北京大学 > 化学与分子工程学院

	Synthesis and characteristics of Ti-Fe nanoparticles by hydrogen plasma-metal reaction
	Liu, T ; Shao, H ; Li, X
刊名	intermetallics
	2004
关键词	nanostructured intermetallics vapor deposition metals hydrogen plasma morphology crystal structure MAGNETIC-PROPERTIES ULTRAFINE PARTICLES NI OXIDATION POWDERS ALLOYS SYSTEMS FILMS CU
DOI	10.1016/j.intermet.2003.08.004
英文摘要	Titanium hydride nanoparticles and five kinds of Ti-Fe nanoparticles were prepared by hydrogen plasma-metal reaction. The morphology, crystal structure and chemical composition of nanoparticles obtained were investigated by transmission electron microscopy (TEM), X-ray diffraction (XRD) and induction-coupled plasma (ICP) spectroscopy. The particle size was determined by TEM and specific surface area. The formation mechanism of nanoparticles was discussed. It was found that all the nanoparticles have spherical shapes, with average particle size in the range of 22-44 nm. The titanium contents in Ti-Fe ultrafine particles (UFPs) are about 1-2 times lower than those in the master alloys. With Ti contents less than 50 at.% in bulk, the evaporation speed of Fe in Ti-Fe alloys is accelerated greatly by titanium addition. Only the UFPs originating from pure Ti react with hydrogen and form TiH1.924 possessing both FCC and BCT structures. Fe and Fe-7 at.%Ti UFP samples have the structure of alpha-Fe. As to sample Fe-9.9 at.% Ti and Fe-16.6 at.% Ti, some titanium atoms dissolve in alpha-Fe and others combine with iron atoms to form intermetallic TiFe2, therefore no hydrogen is adsorbed. No TiFe2 is detectable in sample Fe-42.2 at.% Ti which consists of the main phase of alpha-Fe, plus a small amount of an unidentified phase. (C) 2003 Published by Elsevier Ltd.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000188228800013&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; SCI(E); EI; 19; ARTICLE; 1; 97-102; 12
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/151612]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Liu, T,Shao, H,Li, X. Synthesis and characteristics of Ti-Fe nanoparticles by hydrogen plasma-metal reaction[J]. intermetallics,2004.
APA	Liu, T,Shao, H,&Li, X.(2004).Synthesis and characteristics of Ti-Fe nanoparticles by hydrogen plasma-metal reaction.intermetallics.
MLA	Liu, T,et al."Synthesis and characteristics of Ti-Fe nanoparticles by hydrogen plasma-metal reaction".intermetallics (2004).