Effect of Reaction Atmosphere and Heating Rate during Reactive Sintering of Ni-Ti Intermetallics

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F17%3A00319392" target="_blank" >RIV/68407700:21340/17:00319392 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/17:00509859

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.proeng.2017.04.139" target="_blank" >http://dx.doi.org/10.1016/j.proeng.2017.04.139</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.proeng.2017.04.139" target="_blank" >10.1016/j.proeng.2017.04.139</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of Reaction Atmosphere and Heating Rate during Reactive Sintering of Ni-Ti Intermetallics

Popis výsledku v původním jazyce

The effect of reaction atmosphere and heating rate during reactive sintering of nickel and titanium powder blend (Ni: 52 at.%, particle size <150 mu m, >99.99% purity, Ti: 48 at.%, particle size <44 mu m, >99.5% purity) were studied. The powder mixtures were uniaxially compressed under pressure of 637 MPa and sintered at temperatures 500, 650, 900 and 1100 degrees C in air, vacuum, argon and nitrogen atmospheres. Two heating rates were applied: 200 and >300 K.min(-1). The results show that a significant effect of reaction atmosphere in terms of the quantity of the Ti2Ni phase applies especially at very high heating rate. In terms of phase morphology, oxygen causes refinement of the structure, regardless of heating rate. Mechanism and kinetics of the reactions leading to NiTi phases were determined by DTA and thermogravimetry. It was found that the Ti2Ni phase forms already at 500 degrees C. At 650 degrees C this phase undergoes a reaction with nickel to NiTi and Ni3Ti. (C) 2017 The Authors. Published by Elsevier Ltd.

Název v anglickém jazyce

Effect of Reaction Atmosphere and Heating Rate during Reactive Sintering of Ni-Ti Intermetallics

Popis výsledku anglicky

The effect of reaction atmosphere and heating rate during reactive sintering of nickel and titanium powder blend (Ni: 52 at.%, particle size <150 mu m, >99.99% purity, Ti: 48 at.%, particle size <44 mu m, >99.5% purity) were studied. The powder mixtures were uniaxially compressed under pressure of 637 MPa and sintered at temperatures 500, 650, 900 and 1100 degrees C in air, vacuum, argon and nitrogen atmospheres. Two heating rates were applied: 200 and >300 K.min(-1). The results show that a significant effect of reaction atmosphere in terms of the quantity of the Ti2Ni phase applies especially at very high heating rate. In terms of phase morphology, oxygen causes refinement of the structure, regardless of heating rate. Mechanism and kinetics of the reactions leading to NiTi phases were determined by DTA and thermogravimetry. It was found that the Ti2Ni phase forms already at 500 degrees C. At 650 degrees C this phase undergoes a reaction with nickel to NiTi and Ni3Ti. (C) 2017 The Authors. Published by Elsevier Ltd.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA14-03044S" target="_blank" >GA14-03044S: Příprava slitin NiTi s tvarovou pamětí reaktivní sintrací</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

Advances in Material and Processing Technologies Conference

ISBN

—

ISSN

1877-7058

e-ISSN

—

Počet stran výsledku

6

Strana od-do

681-686

Název nakladatele

Elsevier

Místo vydání

Amsterdam

Místo konání akce

Kuala Lumpur

Datum konání akce

8. 11. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000414778400082