Thermal expansion of select M > n+1 > AX > n (M=early transition metal, A=A group element, X=C or N) phases measured by high temperature x-ray diffraction and dilatometry

T. H. Scabarozi; S. Amini; O. Leaffer; A. Ganguly; S. Gupta; W. Tambussi; S. Clipper; J. E. Spanier; M. W. Barsoum; J. D. Hettinger; S. E. Lofland

doi:10.1063/1.3021465

$Thermal expansion of select M > n+1 > AX > n (M=early transition metal, A=A group element, X=C or N) phases measured by high temperature x-ray diffraction and dilatometry$

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Thermal expansion of select M > n+1 > AX > n (M=early transition metal, A=A group element, X=C or N) phases measured by high temperature x-ray diffraction and dilatometry

T. H. Scabarozi, S. Amini, O. Leaffer, A. Ganguly, S. Gupta, W. Tambussi, S. Clipper, J. E. Spanier, M. W. Barsoum, J. D. Hettinger, …

Journal of applied physics, v 105(1)

01 Jan 2009

DOI: https://doi.org/10.1063/1.3021465

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Abstract

Physical Sciences

Physics

Physics, Applied

Science & Technology

Herein we report on a systematic investigation of the thermal expansion of select M(n+1)AX(n) phases. The bulk dilatometric thermal expansion coefficient alpha(dil) was measured in the 25-1200 degrees C temperature range and the thermal expansion of more than 15 of these phases was studied by x- ray diffraction in the 25- 800 degrees C temperature range. The coefficient of thermal expansion for the a axis alpha(a) ranged between (2.9 +/- 0.1) X 10(-6) degrees C-1 (Nb2AsC) and (12.9 +/- 0.1) X 10(-6) degrees C-1 (Cr2GeC) while the coefficient for the c axis (alpha(c)) ranged between (6.4 +/- 0.2) X 10(-6) degrees C-1 (Ta2AlC) and (17.6 +/- 0.2) X 10(-6) degrees C-1 (Cr2GeC). Weak anisotropy in the thermal expansion was seen in most phases, with the largest value of alpha(c)/alpha(a) belonging to Nb2AsC. The Greneisen parameters along the a and c directions were calculated from ab initio values for the elastic compliances and were relatively isotropic. A good correlation was found between the thermal expansion anisotropy and the elastic constant c(13) and we conclude that the anisotropy in thermal expansion is related to the bonding between the M-A elements. (C) 2009 American Institute of Physics.

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Title: Thermal expansion of select M > n+1 > AX > n (M=early transition metal, A=A group element, X=C or N) phases measured by high temperature x-ray diffraction and dilatometry
Creators: T. H. Scabarozi - Drexel University
S. Amini - Drexel University
O. Leaffer - Drexel University
A. Ganguly - Drexel University
S. Gupta - Drexel University
W. Tambussi - Rowan University
S. Clipper - Rowan University
J. E. Spanier - Drexel University
M. W. Barsoum - Drexel University
J. D. Hettinger - Rowan Univ, Dept Phys & Astron, Glassboro, NJ 08028 USA
S. E. Lofland - Rowan Univ, Dept Phys & Astron, Glassboro, NJ 08028 USA
Publication Details: Journal of applied physics, v 105(1)
Publisher: American Institute of Physics
Number of pages: 8
Grant note: DMR-0503711 / National Science Foundation; National Science Foundation (NSF)
Resource Type: Journal article
Language: English
Academic Unit: Materials Science and Engineering; Mechanical Engineering and Mechanics
Web of Science ID: WOS:000262534100076
Scopus ID: 2-s2.0-67649813513
Other Identifier: 991019168764404721

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Collaboration types: Domestic collaboration
Web of Science research areas: Physics, Applied

Thermal expansion of select M > n+1 > AX > n (M=early transition metal, A=A group element, X=C or N) phases measured by high temperature x-ray diffraction and dilatometry

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