ScPd2Al3 New Polymorphic Phase in Al-Pd-Sc System

Etsuji Yamamoto; Ivana C\'isa\v{r}ov\'a; Ji\v{r}\'i Posp\'i\v{s}il; Kunihisa Nakajima; Naoyuki Tateiwa; Norito Ishikawa; Tomoo Yamamura; Yoshinori Haga

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ScPd2Al3 New Polymorphic Phase in Al-Pd-Sc System

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arxiv 1709.06843 v1 pith:TRPWIIS4 submitted 2017-09-20 cond-mat.mtrl-sci

Jiří Pospíšil , Yoshinori Haga , Kunihisa Nakajima , Norito Ishikawa , Ivana Císařová , Naoyuki Tateiwa , Etsuji Yamamoto , Tomoo Yamamura This is my paper · ORCID

classification cond-mat.mtrl-sci

keywords scpd2al3phasepolymorphicstructuretemperatureal-pd-scal54pd30sc16composition

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We have discovered a new compound of the composition ScPd2Al3 crystallizing in unknown structure type. Moreover, ScPd2Al3 reveals polymorphism. We have found an orthorhombic crystal structure at room temperature and a high temperature cubic phase. The polymorphic phases are separated by a reversible first order transition at 1053{\deg}C with a hysteresis of 19{\deg}C. ScPd2Al3 exists as a very stable intermetallic phase just in the vicinity of the icosahedral quasicrystal Tsai-type i-phase Al54Pd30Sc16.

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