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Original title:
Compressive Creep Tests of An Aluminium Powder Composite Reinforced by Ceramic Particles
Authors: Dvořák, Jiří ; Král, Petr ; Balog, M. ; Simančík, F. ; Sklenička, Václav
Document type: Papers
Conference/Event: METAL 2011 /20./, Brno (CZ), 2011-05-18 / 2011-05-20
Year: 2011
Language: eng
Abstract: The aim of this work is to study of a composite mixture of aluminium powders, to analyze of composite microstructure and mostly to describe the creep behaviour of composite in compression. The experimental material was based on Al powder matrix (Al 99%) about the particle size of less than 200 µm. This powder was mixtured with silicon carbide particles (SiC) having the size about 10 µm. The Al composite powder was prepared via conventional direct hot-extrusion (DE) at temperature 450°C. The microstructural investigations were performed using OM and SEM. It was found that DE process exhibits some breaking of carbide particles to size of range from 0.5 to 5 µm. Creep tests in compression were conducted at temperatures 423 -623 K and at applied stresses in the range from 60 to 100 MPa. Consequently, for an evaluation of controlling creep mechanisms an activation energy of creep and the stress exponent of the creep rate were determined.
Keywords: aluminium powder; ceramic particles; creep
Project no.: CEZ:AV0Z20410507 (CEP), KJB200410801 (CEP)
Funding provider: GA AV ČR
Host item entry: Metal 2011, ISBN 978-80-87294-24-6
Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0207856
Permalink: http://www.nusl.cz/ntk/nusl-109894
The record appears in these collections:
Research > Institutes ASCR > Institute of Physics of Materials
Conference materials > Papers
Authors: Dvořák, Jiří ; Král, Petr ; Balog, M. ; Simančík, F. ; Sklenička, Václav
Document type: Papers
Conference/Event: METAL 2011 /20./, Brno (CZ), 2011-05-18 / 2011-05-20
Year: 2011
Language: eng
Abstract: The aim of this work is to study of a composite mixture of aluminium powders, to analyze of composite microstructure and mostly to describe the creep behaviour of composite in compression. The experimental material was based on Al powder matrix (Al 99%) about the particle size of less than 200 µm. This powder was mixtured with silicon carbide particles (SiC) having the size about 10 µm. The Al composite powder was prepared via conventional direct hot-extrusion (DE) at temperature 450°C. The microstructural investigations were performed using OM and SEM. It was found that DE process exhibits some breaking of carbide particles to size of range from 0.5 to 5 µm. Creep tests in compression were conducted at temperatures 423 -623 K and at applied stresses in the range from 60 to 100 MPa. Consequently, for an evaluation of controlling creep mechanisms an activation energy of creep and the stress exponent of the creep rate were determined.
Keywords: aluminium powder; ceramic particles; creep
Project no.: CEZ:AV0Z20410507 (CEP), KJB200410801 (CEP)
Funding provider: GA AV ČR
Host item entry: Metal 2011, ISBN 978-80-87294-24-6
Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0207856
Permalink: http://www.nusl.cz/ntk/nusl-109894
The record appears in these collections:
Research > Institutes ASCR > Institute of Physics of Materials
Conference materials > Papers
Record created 2012-03-16, last modified 2024-01-26