The influence of sintering time on the microstructural properties of chromium-rhenium matrix composites

M. Chmielewski , S. Nosewicz , Dorota Jakubowska , Małgorzata Lewandowska , Jarosław Mizera , J. Rojek , Piotr Bazarnik

Abstract

This paper comprises the results of studies of the changes in the structure of Cr-Re-Al2O3 metal matrix depending on heat treatment time in sintering temperature. The density of material with the following composition: 95%(75%Cr-25%Al2O3)+5%Re was increased using the technique of sintering under pressure (30MPa) at the temperature of 1450°C. As a result, materials characterized by a high relative density (< 97% of theoretical density) were obtained. Next, they were subjected to structural tests including scanning and transmission electron microscopy as well as X-ray diffraction. Changes in the phase composition, grains size and parameters of crystallographic structure depending on heat treatment time were analysed. It was found that during sintering rhenium is dissolved in the chromium matrix and Cr-Re solid solution is formed. When sintering time is extended to 120 min, the matrix of the composite becomes completely homogenous, which results in an increased strength of the composite.
Author M. Chmielewski
M. Chmielewski,,
-
, S. Nosewicz
S. Nosewicz,,
-
, Dorota Jakubowska ZPM
Dorota Jakubowska,,
- Division of Materials Design
, Małgorzata Lewandowska ZPM
Małgorzata Lewandowska,,
- Division of Materials Design
, Jarosław Mizera ZPM
Jarosław Mizera,,
- Division of Materials Design
, J. Rojek
J. Rojek,,
-
, Piotr Bazarnik ZPM
Piotr Bazarnik,,
- Division of Materials Design
Journal seriesInternational Journal of Refractory Metals & Hard Materials, ISSN 0263-4368
Issue year2016
Vol59
Pages78-86
Publication size in sheets0.5
Keywords in EnglishMetal matrix composites; Rhenium; Hot pressing; Microstructure analysis; XRD
DOIDOI:10.1016/j.ijrmhm.2016.05.017
URL http://www.sciencedirect.com/science/article/pii/S0263436816301962
Languageen angielski
Score (nominal)35
ScoreMinisterial score = 35.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 2.155 (2) - 2016=2.334 (5)
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