鎳、銅對鉬之活化燒結及液相燒結行為之影響
Date Issued
2000
Date
2000
Author(s)
黃坤祥
DOI
892216E002021
Abstract
The sintering temperature of
molybdenum is usually greater than 1700℃.
To decrease the high sintering temperature,
both activated sintering and liquid phase
sintering techniques have been used. The
objective of this study was to investigate the
effect of nickel and copper additions on the
physical properties and the sintering behavior
of thus sintered molybdenum. Results
showed that Mo-1.5Ni and Mo-1Ni-0.5Cu
when sintered at 1370℃ and 1300℃, 97.6%
and 99% density were obtained, respectively.
However, the conductivity and ductility
became much lower compared with pure
molybdenum sintered at 1750 ℃ . Auger
spectra analyses and high resolution TEM
images showed that a 2nm thick layer of δ-
NiMo intermetallic compound formed at
grain boundaries during sintering. This layer
is believed to cause the deterioration of
mechanical and physical properties of the
activated and liquid phase sintered
molybdenum.
Subjects
Activated Sintering
Liquid Phase Sintering
δ-NiMo Intermetallic Compound
Publisher
臺北市：國立臺灣大學材料科學與工程學研究所
Type
report
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