Modeling a material from packing, through sintering and to the final microstructural properties

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Abstract

We present a combination of numerical models that can together simulate the initial packing of particles, followed by sintering and finally the resulting microstructural properties. For the latter we here focus on the magnetism of a sintered sample, and the associated coupling between heat and magnetism known as the magnetocaloric effect. We present a 3-dimensional time-dependent numerical model that spatially resolves samples down to the grain size, and includes the demagnetizing field, chemical inhomogeneity realized as a spatial variation of Curie temperature across the sample, local hysteresis and heat transfer. We can thus model how particle size, packing, sintering and chemical inhomogeneity affect the observed properties of magnetocaloric samples. For example, we show that even a modest distribution in Curie temperature (TC) across the sample results in a significant broadening and lowering of the total entropy change of the sample around TC. We discuss how clustering of grains with similar values of TC across the sample influences the results.
Original languageEnglish
Publication date2017
Number of pages1
Publication statusPublished - 2017
EventInternational Conference on Sintering 2017 - San Diego, California, United States
Duration: 12 Nov 201716 Nov 2017
http://ceramics.org/international-conference-on-sintering-2017

Conference

ConferenceInternational Conference on Sintering 2017
CountryUnited States
CitySan Diego, California
Period12/11/201716/11/2017
Internet address

Cite this

Bjørk, R., & Nielsen, K. K. (2017). Modeling a material from packing, through sintering and to the final microstructural properties. Abstract from International Conference on Sintering 2017, San Diego, California, United States.
Bjørk, Rasmus ; Nielsen, Kaspar Kirstein. / Modeling a material from packing, through sintering and to the final microstructural properties. Abstract from International Conference on Sintering 2017, San Diego, California, United States.1 p.
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abstract = "We present a combination of numerical models that can together simulate the initial packing of particles, followed by sintering and finally the resulting microstructural properties. For the latter we here focus on the magnetism of a sintered sample, and the associated coupling between heat and magnetism known as the magnetocaloric effect. We present a 3-dimensional time-dependent numerical model that spatially resolves samples down to the grain size, and includes the demagnetizing field, chemical inhomogeneity realized as a spatial variation of Curie temperature across the sample, local hysteresis and heat transfer. We can thus model how particle size, packing, sintering and chemical inhomogeneity affect the observed properties of magnetocaloric samples. For example, we show that even a modest distribution in Curie temperature (TC) across the sample results in a significant broadening and lowering of the total entropy change of the sample around TC. We discuss how clustering of grains with similar values of TC across the sample influences the results.",
author = "Rasmus Bj{\o}rk and Nielsen, {Kaspar Kirstein}",
year = "2017",
language = "English",
note = "International Conference on Sintering 2017 ; Conference date: 12-11-2017 Through 16-11-2017",
url = "http://ceramics.org/international-conference-on-sintering-2017",

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Bjørk, R & Nielsen, KK 2017, 'Modeling a material from packing, through sintering and to the final microstructural properties' International Conference on Sintering 2017, San Diego, California, United States, 12/11/2017 - 16/11/2017, .

Modeling a material from packing, through sintering and to the final microstructural properties. / Bjørk, Rasmus; Nielsen, Kaspar Kirstein.

2017. Abstract from International Conference on Sintering 2017, San Diego, California, United States.

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

TY - ABST

T1 - Modeling a material from packing, through sintering and to the final microstructural properties

AU - Bjørk, Rasmus

AU - Nielsen, Kaspar Kirstein

PY - 2017

Y1 - 2017

N2 - We present a combination of numerical models that can together simulate the initial packing of particles, followed by sintering and finally the resulting microstructural properties. For the latter we here focus on the magnetism of a sintered sample, and the associated coupling between heat and magnetism known as the magnetocaloric effect. We present a 3-dimensional time-dependent numerical model that spatially resolves samples down to the grain size, and includes the demagnetizing field, chemical inhomogeneity realized as a spatial variation of Curie temperature across the sample, local hysteresis and heat transfer. We can thus model how particle size, packing, sintering and chemical inhomogeneity affect the observed properties of magnetocaloric samples. For example, we show that even a modest distribution in Curie temperature (TC) across the sample results in a significant broadening and lowering of the total entropy change of the sample around TC. We discuss how clustering of grains with similar values of TC across the sample influences the results.

AB - We present a combination of numerical models that can together simulate the initial packing of particles, followed by sintering and finally the resulting microstructural properties. For the latter we here focus on the magnetism of a sintered sample, and the associated coupling between heat and magnetism known as the magnetocaloric effect. We present a 3-dimensional time-dependent numerical model that spatially resolves samples down to the grain size, and includes the demagnetizing field, chemical inhomogeneity realized as a spatial variation of Curie temperature across the sample, local hysteresis and heat transfer. We can thus model how particle size, packing, sintering and chemical inhomogeneity affect the observed properties of magnetocaloric samples. For example, we show that even a modest distribution in Curie temperature (TC) across the sample results in a significant broadening and lowering of the total entropy change of the sample around TC. We discuss how clustering of grains with similar values of TC across the sample influences the results.

M3 - Conference abstract for conference

ER -

Bjørk R, Nielsen KK. Modeling a material from packing, through sintering and to the final microstructural properties. 2017. Abstract from International Conference on Sintering 2017, San Diego, California, United States.