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Determination of sintering parameters for liquid phase sintering of silicon nitride

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Title
Determination of sintering parameters for liquid phase sintering of silicon nitride
Name (ID = NAME001); (type = personal)
NamePart (type = family)
Theron
NamePart (type = given)
Claire
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Claire Theron
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RoleTerm (authority = RUETD)
author
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NamePart (type = family)
Cannon
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W.
Affiliation
Advisory Committee
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W. Roger Cannon
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chair
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Danforth
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Stephen
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Advisory Committee
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Stephen C. Danforth
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internal member
Name (ID = NAME004); (type = personal)
NamePart (type = family)
Matthewson
NamePart (type = given)
M.
Affiliation
Advisory Committee
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M. John Matthewson
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internal member
Name (ID = NAME005); (type = personal)
NamePart (type = family)
Pujari
NamePart (type = given)
Vimal
Affiliation
Advisory Committee
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Vimal K. Pujari
Role
RoleTerm (authority = RULIB)
outside member
Name (ID = NAME006); (type = personal)
NamePart (type = family)
Abouaf
NamePart (type = given)
Marc
Affiliation
Advisory Committee
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Marc Abouaf
Role
RoleTerm (authority = RULIB)
outside member
Name (ID = NAME007); (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
Name (ID = NAME008); (type = corporate)
NamePart
Graduate School - New Brunswick
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school
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Text
Genre (authority = marcgt)
theses
OriginInfo
DateCreated (qualifier = exact)
2008
DateOther (qualifier = exact); (type = degree)
2008-01
Language
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English
PhysicalDescription
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electronic
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application/pdf
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text/xml
Extent
xv, 219 pages
Abstract
The sintering parameters of silicon nitride were determined during the second stage of liquid phase sintering via interrupted sinter forging tests under compressive uniaxial load.
The silicon nitride with an yttria-alumina rich secondary phase (Saint-Gobain composition NB D300) was submitted to seven level of stress (from 0.24MPa to 9.41MPa) at three different temperatures (1500°C, 1550°C and 1600°C) with continuous monitoring of the axial and longitudinal shrinkage during all experiments to directly obtain the sintering stress, Poisson's ratio and bulk viscosity.
The sintering stress measured in the first 1.5 minutes after reaching temperature was 7.5MPa at 1500°C (~60% theoretical density), 21.5 MPa at 1550°C (~70% dense) and 11.5MPa at 1600°C (~80% dense). The bulk viscosity also peaks at the intermediate density at about 48GPas .
This variation is largely attributed to the noticeable changes of microstructure during the second stage of liquid phase sintering, especially the overall pore size distribution as well as the degree to which the liquid phase is fully melted and partially or fully fills the smallest pores.
The experimental data were then inserted into a numerical model developed by Abouaf. Proper fit of the model could not be obtained without considering the rearrangement stage of sintering. Considering both the rearrangement and solution-precipitation stages of densification, it was possible to determine the variation during sintering of different parameters that influences the liquid phase sintering and therefore the microstructure development.
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references (p. 213-218).
Subject (ID = SUBJ1); (authority = RUETD)
Topic
Ceramic and Materials Science and Engineering
Subject (ID = SUBJ2); (authority = ETD-LCSH)
Topic
Silicon nitride
Subject (ID = SUBJ3); (authority = ETD-LCSH)
Topic
Sintering
RelatedItem (type = host)
TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
Identifier (type = local)
rucore19991600001
Identifier (type = hdl)
http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.17229
Identifier
ETD_707
Location
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NjNbRU
Identifier (type = doi)
doi:10.7282/T3QZ2B96
Genre (authority = ExL-Esploro)
ETD doctoral
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The author owns the copyright to this work.
Copyright
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Open
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Name
Claire THERON
Role
Copyright holder
Affiliation
Rutgers University. Graduate School - New Brunswick
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Author Agreement License
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I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
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