Effects of heating history on sintering properties of nickel powder compacts

The effects of heating history on the sinterability of nickel powder compacts as a model material are examined from a view point of driving force and flow resistance, that is, the sintering stress and viscosity. Sinter-compression tests were conducted at different constant temperatures for cylindric...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Kazunari SHINAGAWA, Sho UTSUNOMIYA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2015
Materias:	sintering stress viscosity two step sintering sinter compression test pore Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/bab69d067c864543933986457ecdb939
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:bab69d067c864543933986457ecdb939
record_format	dspace
spelling	oai:doaj.org-article:bab69d067c864543933986457ecdb9392021-11-26T06:30:10ZEffects of heating history on sintering properties of nickel powder compacts2187-974510.1299/mej.15-00259https://doaj.org/article/bab69d067c864543933986457ecdb9392015-08-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/2/5/2_15-00259/_pdf/-char/enhttps://doaj.org/toc/2187-9745The effects of heating history on the sinterability of nickel powder compacts as a model material are examined from a view point of driving force and flow resistance, that is, the sintering stress and viscosity. Sinter-compression tests were conducted at different constant temperatures for cylindrical specimens, which underwent one-step or two-step heating. In the two-step heating, the specimens were heated up to a higher temperature and cooled down to the test temperatures. After the tests, the microstructure of each specimen was examined and compared with the change in sintering stress and viscosity. For the whole range of test temperatures, viscosity was increased by the two-step heating, which can be explained by the effects of time-hardening. On the other hand, for the lower range of test temperatures, the sintering stress was decreased by the two-step heating. This may be a result of the formation of large pores due to inhomogeneous shrinkage in the unstable state of the powder with small contact in the initial stage of sintering.Kazunari SHINAGAWASho UTSUNOMIYAThe Japan Society of Mechanical Engineersarticlesintering stressviscositytwo step sinteringsinter compression testporeMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 2, Iss 5, Pp 15-00259-15-00259 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	sintering stress viscosity two step sintering sinter compression test pore Mechanical engineering and machinery TJ1-1570
spellingShingle	sintering stress viscosity two step sintering sinter compression test pore Mechanical engineering and machinery TJ1-1570 Kazunari SHINAGAWA Sho UTSUNOMIYA Effects of heating history on sintering properties of nickel powder compacts
description	The effects of heating history on the sinterability of nickel powder compacts as a model material are examined from a view point of driving force and flow resistance, that is, the sintering stress and viscosity. Sinter-compression tests were conducted at different constant temperatures for cylindrical specimens, which underwent one-step or two-step heating. In the two-step heating, the specimens were heated up to a higher temperature and cooled down to the test temperatures. After the tests, the microstructure of each specimen was examined and compared with the change in sintering stress and viscosity. For the whole range of test temperatures, viscosity was increased by the two-step heating, which can be explained by the effects of time-hardening. On the other hand, for the lower range of test temperatures, the sintering stress was decreased by the two-step heating. This may be a result of the formation of large pores due to inhomogeneous shrinkage in the unstable state of the powder with small contact in the initial stage of sintering.
format	article
author	Kazunari SHINAGAWA Sho UTSUNOMIYA
author_facet	Kazunari SHINAGAWA Sho UTSUNOMIYA
author_sort	Kazunari SHINAGAWA
title	Effects of heating history on sintering properties of nickel powder compacts
title_short	Effects of heating history on sintering properties of nickel powder compacts
title_full	Effects of heating history on sintering properties of nickel powder compacts
title_fullStr	Effects of heating history on sintering properties of nickel powder compacts
title_full_unstemmed	Effects of heating history on sintering properties of nickel powder compacts
title_sort	effects of heating history on sintering properties of nickel powder compacts
publisher	The Japan Society of Mechanical Engineers
publishDate	2015
url	https://doaj.org/article/bab69d067c864543933986457ecdb939
work_keys_str_mv	AT kazunarishinagawa effectsofheatinghistoryonsinteringpropertiesofnickelpowdercompacts AT shoutsunomiya effectsofheatinghistoryonsinteringpropertiesofnickelpowdercompacts
_version_	1718409804975702016

Effects of heating history on sintering properties of nickel powder compacts

Ejemplares similares