A study of CaH2 effectiveness as oxidation prevention in solid state sintering of single phase NiTi alloy

This research aims to study the conditions that may produce single phase NiTi for desirable shape memory effect under solid state by suppressing the oxide levels using CaH2 as in-situ reducing agent. A systematic comparative investigation was made on phase formation and their transformation behavior...

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Main Authors:	Mohd Zaki, Hafizah Hanim, Abdullah, Jamaluddin
Format:	Article
Language:	English
Published:	Medwell Journals 2015
Subjects:	TA401 Materials of engineering and construction
Online Access:	http://irep.iium.edu.my/62555/ http://irep.iium.edu.my/62555/ http://irep.iium.edu.my/62555/ http://irep.iium.edu.my/62555/1/Research%20Journal%20of%20applied%20Science_hanim.pdf

id	iium-62555
recordtype	eprints
spelling	iium-625552019-04-03T04:25:58Z http://irep.iium.edu.my/62555/ A study of CaH2 effectiveness as oxidation prevention in solid state sintering of single phase NiTi alloy Mohd Zaki, Hafizah Hanim Abdullah, Jamaluddin TA401 Materials of engineering and construction This research aims to study the conditions that may produce single phase NiTi for desirable shape memory effect under solid state by suppressing the oxide levels using CaH2 as in-situ reducing agent. A systematic comparative investigation was made on phase formation and their transformation behavior. Phase formation analysis was carried out using Scanning Electron Microscope (SEM), Energy Dispersive Spectroscope (EDS) and X-Ray Diffractometer (XRD). The transformation behaviour was studied by means of Differential Scanning Calorimetry (DSC) measurements. Thermomechanical analysis was conducted using Thermomechanical Analyzer (TMA). The study revealed that single phase NiTi was successfully formed from Ni-TiH2 specimen sintered at 930°C for 3 h under CaH2 reducing environment with good enthalpy change of ΔHA-M = 26 J g-1 and ΔHM-A = 25.5 J g-1 upon cooling and heating, respectively. However, the recovery strain reaches 0.75% at maximum 8 N applied load which is still below than the reported bulk NiTi. Medwell Journals 2015 Article PeerReviewed application/pdf en http://irep.iium.edu.my/62555/1/Research%20Journal%20of%20applied%20Science_hanim.pdf Mohd Zaki, Hafizah Hanim and Abdullah, Jamaluddin (2015) A study of CaH2 effectiveness as oxidation prevention in solid state sintering of single phase NiTi alloy. Research Journal of Applied Sciences, 10 (1). pp. 28-32. ISSN 1815-932X E-ISSN 1993-6079 http://docsdrive.com/pdfs/medwelljournals/rjasci/2015/28-32.pdf 10.3923/rjasci.2015.28.32
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TA401 Materials of engineering and construction
spellingShingle	TA401 Materials of engineering and construction Mohd Zaki, Hafizah Hanim Abdullah, Jamaluddin A study of CaH2 effectiveness as oxidation prevention in solid state sintering of single phase NiTi alloy
description	This research aims to study the conditions that may produce single phase NiTi for desirable shape memory effect under solid state by suppressing the oxide levels using CaH2 as in-situ reducing agent. A systematic comparative investigation was made on phase formation and their transformation behavior. Phase formation analysis was carried out using Scanning Electron Microscope (SEM), Energy Dispersive Spectroscope (EDS) and X-Ray Diffractometer (XRD). The transformation behaviour was studied by means of Differential Scanning Calorimetry (DSC) measurements. Thermomechanical analysis was conducted using Thermomechanical Analyzer (TMA). The study revealed that single phase NiTi was successfully formed from Ni-TiH2 specimen sintered at 930°C for 3 h under CaH2 reducing environment with good enthalpy change of ΔHA-M = 26 J g-1 and ΔHM-A = 25.5 J g-1 upon cooling and heating, respectively. However, the recovery strain reaches 0.75% at maximum 8 N applied load which is still below than the reported bulk NiTi.
format	Article
author	Mohd Zaki, Hafizah Hanim Abdullah, Jamaluddin
author_facet	Mohd Zaki, Hafizah Hanim Abdullah, Jamaluddin
author_sort	Mohd Zaki, Hafizah Hanim
title	A study of CaH2 effectiveness as oxidation prevention in solid state sintering of single phase NiTi alloy
title_short	A study of CaH2 effectiveness as oxidation prevention in solid state sintering of single phase NiTi alloy
title_full	A study of CaH2 effectiveness as oxidation prevention in solid state sintering of single phase NiTi alloy
title_fullStr	A study of CaH2 effectiveness as oxidation prevention in solid state sintering of single phase NiTi alloy
title_full_unstemmed	A study of CaH2 effectiveness as oxidation prevention in solid state sintering of single phase NiTi alloy
title_sort	study of cah2 effectiveness as oxidation prevention in solid state sintering of single phase niti alloy
publisher	Medwell Journals
publishDate	2015
url	http://irep.iium.edu.my/62555/ http://irep.iium.edu.my/62555/ http://irep.iium.edu.my/62555/ http://irep.iium.edu.my/62555/1/Research%20Journal%20of%20applied%20Science_hanim.pdf
first_indexed	2023-09-18T21:28:39Z
last_indexed	2023-09-18T21:28:39Z
_version_	1777412361762635776

A study of CaH2 effectiveness as oxidation prevention in solid state sintering of single phase NiTi alloy

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