TY - JOUR
T1 - Structural analysis and martensitic transformation in equiatomic HfPd alloy
AU - Hisada, Shota
AU - Matsuda, M.
AU - Takashima, K.
AU - Yamabe-Mitarai, Y.
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant number 26420725 and Kumamoto University Challenging Research Projects . The authors would like to express their sincere gratitude to Professor S. Tsurekawa of Kumamoto University for his valuable comments.
Publisher Copyright:
© 2017 Elsevier Inc.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2018/2/1
Y1 - 2018/2/1
N2 - We investigated the crystal structure and the martensitic transformation in equiatomic HfPd alloy. The analysis of the crystal structure by electron diffraction and Rietveld refinement using X-ray diffraction data indicates that the space group of the martensitic phase is Cmcm, and the lattice parameters are a = 0.329 nm, b = 1.021 nm, and c = 0.438 nm. Martensitic variants are composed of the plate-like morphology of several hundred nm, and the boundaries between the variants have (021)Cmcm twin relations. This (021)Cmcm twin boundary seems to be sharp without ledge and steps. Differential scanning calorimetry measurement indicates that each martensitic transformation temperature is determined to be Ms = 819 K, Mf = 794 K, As = 928 K, and Af = 954 K. Based on the dimension change using a thermo-mechanical analyzer, the expansion and shrinkage of the sample occurred with the forward and reverse martensitic transformation, respectively.
AB - We investigated the crystal structure and the martensitic transformation in equiatomic HfPd alloy. The analysis of the crystal structure by electron diffraction and Rietveld refinement using X-ray diffraction data indicates that the space group of the martensitic phase is Cmcm, and the lattice parameters are a = 0.329 nm, b = 1.021 nm, and c = 0.438 nm. Martensitic variants are composed of the plate-like morphology of several hundred nm, and the boundaries between the variants have (021)Cmcm twin relations. This (021)Cmcm twin boundary seems to be sharp without ledge and steps. Differential scanning calorimetry measurement indicates that each martensitic transformation temperature is determined to be Ms = 819 K, Mf = 794 K, As = 928 K, and Af = 954 K. Based on the dimension change using a thermo-mechanical analyzer, the expansion and shrinkage of the sample occurred with the forward and reverse martensitic transformation, respectively.
KW - Crystal structure
KW - Intermetallics
KW - Microstructure
KW - Transmission electron microscopy, TEM
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U2 - 10.1016/j.jssc.2017.12.002
DO - 10.1016/j.jssc.2017.12.002
M3 - Article
AN - SCOPUS:85037710210
VL - 258
SP - 712
EP - 717
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
SN - 0022-4596
ER -