The effect of point defects on the precipitation of Fe in NiAlFe intermetallic compounds

Title
The effect of point defects on the precipitation of Fe in NiAlFe intermetallic compounds
Authors
박희섭고홍석홍경태이경섭
Keywords
NiAlFe; 석출; Point Defect
Issue Date
1998-05
Publisher
대한금속학회지
Citation
VOL 36, NO 5, 625-630
Abstract
The influence of point defects on the precipitation was investigated in NiAlFe by means of magnetic susceptibility measurement, differential scanning calorimetry, microhardness and TEM analysis. The magnetic measurements revealed that the ferromagnetic phases consisting of Fe atoms precipitated rapidly at about 700K and dissolved completely at temperatures over 1000K in NiAl alloys containing Fe over 6 at.%. Formation energy of thermal vacancies in NiAlFe was determined to be about 0.85 eV through analysis of quenching data in the range of 1000K-1500K. TEM analysis indicated that very fine α-Fe particles were distributed uniformly in NiAl matrix. Superparamagnetic behaviors were attributed to Fe particles in NiAl12Fe. Only the stoichiometric NiAl containing Fe showed a significant increase in magnetic susceptibility during aging treatment. It is considered that she formation of Fe particles is not dependent on consitutional vacancy but thermal vacancy.
URI
http://pubs.kist.re.kr/handle/201004/12603
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE