Cryomilled and spark plasma sintered titanium: the evolution of microstructure

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10370507" target="_blank" >RIV/00216208:11320/17:10370507 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1088/1757-899X/194/1/012023" target="_blank" >http://dx.doi.org/10.1088/1757-899X/194/1/012023</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1757-899X/194/1/012023" target="_blank" >10.1088/1757-899X/194/1/012023</a>

Result language

angličtina

Original language name

Cryomilled and spark plasma sintered titanium: the evolution of microstructure

Original language description

Bulk ultra-fine grained (UFG) commercially pure Ti was prepared by cryogenic milling in liquid argon and subsequent spark plasma sintering (SPS). During cryogenic milling, individual powder particles are repetitively severely deformed by attrition forces. Powder particles were not significantly refined, but due to severe repetitive plastic deformation, ultra fine grained microstructure emerges within each powder particle. Cryogenic milling can be therefore considered as a specific severe plastic deformation (SPD) method. Compactization of cryomilled powder by SPS technique (also referred to as field assisted sintering technique FAST) requires significantly lower sintering temperatures and shorter sintering times for successful compaction when compared to any other sintering technique. This is crucial for maintaining the UFG microstructure due to its limited thermal stability. Several specimens were prepared by varying processing parameters, in particular the sintering temperature. The microstructure of powders and compacted samples was observed by scanning electron microscopy (SEM). Increased sintering temperature results in recrystallization and grain growth. A trade-off relationship between the density of compacted material and grain size was identified. Microhardness of the material was found to depend on residual porosity rather than grain size. This contribution presents cryogenic milling and spark plasma sintering as a viable alternative for achieving UFG microstructure in commercially pure Ti.

Czech name

—

Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

<a href="/en/project/GB14-36566G" target="_blank" >GB14-36566G: Multidisciplinary research centre for advanced materials</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

7TH INTERNATIONAL CONFERENCE ON NANOMATERIALS BY SEVERE PLASTIC DEFORMATION

ISBN

—

ISSN

1757-8981

e-ISSN

neuvedeno

Number of pages

6

Pages from-to

—

Publisher name

IOP PUBLISHING LTD

Place of publication

BRISTOL

Event location

Sydney

Event date

Jul 2, 2017

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000411380900023