Crystallographic structures and phase transformations in ZrPd

被引：52

作者：

Bendersky, LA ^{[1
]}

Stalick, JK ^{[1
]}

Portier, R ^{[1
]}

Waterstrat, RM ^{[1
]}

机构：

[1] ECOLE NATL SUPER CHIM PARIS,F-67084 PARIS,FRANCE

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1996年 / 236卷 / 1-2期

关键词：

crystallographic structures; phase transformations; ZrPd;

D O I：

10.1016/0925-8388(96)80046-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Phase transformations and crystal structures in the equiatomic compound ZrPd were examined using in-situ heating and cooling in a transmission electron microscope (selected-area diffraction and high resolution imaging) and Rietveld refinement of high resolution neutron powder diffraction data. Three phases were characterized: a high temperature cubic B2-type phase (Pm3m; Z = 1; a = 0.335 97(3) nm at 800 degrees C); an orthorhombic CrB-type phase formed by martensitic transformation from the B2 phase (Cmcm; Z = 4; a = 0.333 19(3) nm, b = 1.0301(1) nm and c = 0.441 11(4) nm at 400 degrees C) and a monoclinic variant of the CrB-type phase at room temperature (assumed space group Cm; Z = 8; a = 0.66611(6) nm, b =0.87499(7) nm, c = 0.542 35(6) nm; beta = 108.21(1)degrees). The monoclinic reversible arrow orthorhombic phase transformation was found to occur reversibly around 200 degrees C.

引用

页码：19 / 25

页数：7

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