銅-鋅-錫/鋯合金之形狀記憶效應及相變態研究
Date Issued
2004
Date
2004
Author(s)
王文雄
DOI
922216E002030
Abstract
In this experiment, three kinds of Cu-Zn-Sn
alloys with 3~5wt% Sn were melted in evacuated
quartz capsules. After homogenized and hot rolled at
800℃, the specimens were quenched into -10℃
NaOH solutions from 800℃~870℃. The effects of
alloy additions on the transformation temperatures
were determined by differential scanning calorimetry
（DSC）and by means of measuring the variation of
resistivity with temperature. Microstructures and
crystal structures of the specimens after heat
treatments were examined by scanning electron
microscope (SEM), transmission electron microscope
(TEM), and x-ray diffraction (XRD).
The results show that the crystal structures of
parent phase and martensite of Cu-Zn-Sn alloy are B2
and M9R respectively. After fifty thermal cycles, they
still have good thermal stability and shape recovery.
The morphologies of the precipitates were changed
with different aging temperature. Two endothermic
peaks between 228℃and 342℃ were found on DSC
heating curve, the first peak (250℃) is α1-plate
whose structure is M9R, and the second peak (300℃) is a BCC γ precipitate.
Subjects
shape memory effect
shape recovery
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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