Effect of annealing temperatures on surface oxidation of Ti-50.8 at% Ni shape memory alloy

Nowadays, the used of NiTi shape memory alloys in biomedical field is growing exponentially linear with technological advancement. With all great benefits from NiTi, however, they also come with certain level of toxicity that can harm human’s health sourcing from the Ni itself. Many techniques hav...

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Main Authors:	Mohamad Sholihin, Mohamad Hanis, Mohd Zaki, Hafizah Hanim, Sarifuddin, Norshahida, Nor Hairin, Assayidatul Laila
Format:	Conference or Workshop Item
Language:	English English English
Published:	American Institute of Physics Inc. 2019
Subjects:	TA401 Materials of engineering and construction TJ Mechanical engineering and machinery
Online Access:	http://irep.iium.edu.my/69756/ http://irep.iium.edu.my/69756/ http://irep.iium.edu.my/69756/ http://irep.iium.edu.my/69756/1/69756_Effect%20of%20annealing%20on%20surface_complete.pdf http://irep.iium.edu.my/69756/2/69756_Effect%20of%20annealing%20on%20surface_scopus.pdf http://irep.iium.edu.my/69756/13/69756_Effect%20of%20annealing%20on%20surface_wos.pdf

id	iium-69756
recordtype	eprints
spelling	iium-697562019-07-18T08:13:07Z http://irep.iium.edu.my/69756/ Effect of annealing temperatures on surface oxidation of Ti-50.8 at% Ni shape memory alloy Mohamad Sholihin, Mohamad Hanis Mohd Zaki, Hafizah Hanim Sarifuddin, Norshahida Nor Hairin, Assayidatul Laila TA401 Materials of engineering and construction TJ Mechanical engineering and machinery Nowadays, the used of NiTi shape memory alloys in biomedical field is growing exponentially linear with technological advancement. With all great benefits from NiTi, however, they also come with certain level of toxicity that can harm human’s health sourcing from the Ni itself. Many techniques have been developed to contain this Ni from leaching out from the NiTi shape memory alloys. Among the techniques, thermal oxidation via annealing treatment is chosen where TiO2 is expected to form on the surface of the NiTi shape memory alloys and may act as a barrier to prevent the Ni from leaching out. Therefore, this research investigates the effect of annealing treatment to produce the optimum thickness of the oxide layer with good martensitic transformation behavior. In this case, NiTi was annealed from 400 °C to 700 °C for duration of 10 to 300 minutes in a furnace. The thickness of oxide layer was characterized using SEM and the transformation behavior was analyzed using DSC equipment. Based on the results obtained from SEM and DSC, by increasing annealing temperature and time, the thickness of the oxide layer increases and more even, however, it reduces the enthalpy change. Therefore, samples annealed at 600 °C for 50 to 150 minutes is an optimum parameter to produce the appropriate thickness and uniformity of the oxide layer (~22 - 26 µm) with reasonable Ms and enthalpy changes (ΔHA→M = 7.50 to 9.62). American Institute of Physics Inc. 2019-02 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/69756/1/69756_Effect%20of%20annealing%20on%20surface_complete.pdf application/pdf en http://irep.iium.edu.my/69756/2/69756_Effect%20of%20annealing%20on%20surface_scopus.pdf application/pdf en http://irep.iium.edu.my/69756/13/69756_Effect%20of%20annealing%20on%20surface_wos.pdf Mohamad Sholihin, Mohamad Hanis and Mohd Zaki, Hafizah Hanim and Sarifuddin, Norshahida and Nor Hairin, Assayidatul Laila (2019) Effect of annealing temperatures on surface oxidation of Ti-50.8 at% Ni shape memory alloy. In: International Conference on X-Rays and Related Techniques in Research and Industry, ICXRI 2018, 18th-19th August, 2018, Grand Riverview Hotel, Kota Bharu. https://aip.scitation.org/doi/abs/10.1063/1.5089302 10.1063/1.5089302
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English English
topic	TA401 Materials of engineering and construction TJ Mechanical engineering and machinery
spellingShingle	TA401 Materials of engineering and construction TJ Mechanical engineering and machinery Mohamad Sholihin, Mohamad Hanis Mohd Zaki, Hafizah Hanim Sarifuddin, Norshahida Nor Hairin, Assayidatul Laila Effect of annealing temperatures on surface oxidation of Ti-50.8 at% Ni shape memory alloy
description	Nowadays, the used of NiTi shape memory alloys in biomedical field is growing exponentially linear with technological advancement. With all great benefits from NiTi, however, they also come with certain level of toxicity that can harm human’s health sourcing from the Ni itself. Many techniques have been developed to contain this Ni from leaching out from the NiTi shape memory alloys. Among the techniques, thermal oxidation via annealing treatment is chosen where TiO2 is expected to form on the surface of the NiTi shape memory alloys and may act as a barrier to prevent the Ni from leaching out. Therefore, this research investigates the effect of annealing treatment to produce the optimum thickness of the oxide layer with good martensitic transformation behavior. In this case, NiTi was annealed from 400 °C to 700 °C for duration of 10 to 300 minutes in a furnace. The thickness of oxide layer was characterized using SEM and the transformation behavior was analyzed using DSC equipment. Based on the results obtained from SEM and DSC, by increasing annealing temperature and time, the thickness of the oxide layer increases and more even, however, it reduces the enthalpy change. Therefore, samples annealed at 600 °C for 50 to 150 minutes is an optimum parameter to produce the appropriate thickness and uniformity of the oxide layer (~22 - 26 µm) with reasonable Ms and enthalpy changes (ΔHA→M = 7.50 to 9.62).
format	Conference or Workshop Item
author	Mohamad Sholihin, Mohamad Hanis Mohd Zaki, Hafizah Hanim Sarifuddin, Norshahida Nor Hairin, Assayidatul Laila
author_facet	Mohamad Sholihin, Mohamad Hanis Mohd Zaki, Hafizah Hanim Sarifuddin, Norshahida Nor Hairin, Assayidatul Laila
author_sort	Mohamad Sholihin, Mohamad Hanis
title	Effect of annealing temperatures on surface oxidation of Ti-50.8 at% Ni shape memory alloy
title_short	Effect of annealing temperatures on surface oxidation of Ti-50.8 at% Ni shape memory alloy
title_full	Effect of annealing temperatures on surface oxidation of Ti-50.8 at% Ni shape memory alloy
title_fullStr	Effect of annealing temperatures on surface oxidation of Ti-50.8 at% Ni shape memory alloy
title_full_unstemmed	Effect of annealing temperatures on surface oxidation of Ti-50.8 at% Ni shape memory alloy
title_sort	effect of annealing temperatures on surface oxidation of ti-50.8 at% ni shape memory alloy
publisher	American Institute of Physics Inc.
publishDate	2019
url	http://irep.iium.edu.my/69756/ http://irep.iium.edu.my/69756/ http://irep.iium.edu.my/69756/ http://irep.iium.edu.my/69756/1/69756_Effect%20of%20annealing%20on%20surface_complete.pdf http://irep.iium.edu.my/69756/2/69756_Effect%20of%20annealing%20on%20surface_scopus.pdf http://irep.iium.edu.my/69756/13/69756_Effect%20of%20annealing%20on%20surface_wos.pdf
first_indexed	2023-09-18T21:39:01Z
last_indexed	2023-09-18T21:39:01Z
_version_	1777413014403678208

Effect of annealing temperatures on surface oxidation of Ti-50.8 at% Ni shape memory alloy

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