BIOACTIVITY AND CORROSION RESISTANCE OF NITI AFTER CALCIUM PLASMA IMMERSION ION IMPLANTATION

X. M. Liu; S. L. Wu; Paul K. Chu; Y. L. Chan; C. Y. Chung; C. L. Chu; K. W. K. Yeung; W. W. Lu; K. M. C. Cheung; K. D. K. Luk

doi:10.1109/PPPS.2007.4345830

BIOACTIVITY AND CORROSION RESISTANCE OF NITI AFTER CALCIUM PLASMA IMMERSION ION IMPLANTATION

X. M. Liu
, S. L. Wu
, Paul K. Chu
, Y. L. Chan
, C. Y. Chung
, C. L. Chu
, K. W. K. Yeung
, W. W. Lu
, K. M. C. Cheung
, K. D. K. Luk

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

Abstract

Summary form only given. Plasma immersion ion implantation (PHI) is an effective approach to enhance the surface properties of various types of biomaterials. In order to enhance the surface bioactivity and corrosion resistance of NiTi shape memory alloy, calcium ions were implanted into NiTi alloys that have been pre-plasma-implanted with oxygen and nitrogen. The results are compared to samples without pre-treatment. The bioactivity of calcium-implanted NiTi was evaluated by immersion tests in simulated body fluid (SBF). The surface of NiTi before and after immersion tests was characterized by X-ray photoelectron spectroscopy (XPS). The XPS results reveal that the structure of the calcium-implanted layer in all the samples is composed of calcium oxide and gradually becomes a Ca-P layer after a period incubation in SBF. This Ca-P film also can be detected by scanning electron microscopy (SEM). To evaluate the anti-corrosion performance of NiTi, electrochemical potentiodynamic polarization tests were conducted on the NiTi samples in SBF. NiTi samples with pre-oxygen and nitrogen plasma implantation exhibit better corrosion resistance than single calcium-implanted samples. Our results indicate that calcium implantation can enhance the bioactivity of NiTi alloy due to the formation of calcium phosphate on the surface of the alloy. Plasma ion implantation can also improve the corrosion resistance of NiTi.

Original language	English
Title of host publication	2007 IEEE 34th International Conference on Plasma Science (ICOPS)
Publisher	IEEE
Pages	524
ISBN (Print)	9781424409150
DOIs	https://doi.org/10.1109/PPPS.2007.4345830
Publication status	Published - Jun 2007
Event	2007 IEEE Pulsed Power and Plasma Science Conference, PPPS-2007 (34th IEEE International Conference on Plasma Science and 16th IEEE International Pulsed Power Conference) - Albuquerque Convention Center, Albuquerque, United States Duration: 17 Jun 2007 → 22 Jun 2007 http://ece-events.unm.edu/ppps2007/

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Name
ISSN (Print)	0730-9244

Conference

Conference	2007 IEEE Pulsed Power and Plasma Science Conference, PPPS-2007 (34th IEEE International Conference on Plasma Science and 16th IEEE International Pulsed Power Conference)
Abbreviated title	PPPS-2007, IPPC07
Place	United States
City	Albuquerque
Period	17/06/07 → 22/06/07
Internet address	http://ece-events.unm.edu/ppps2007/

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10.1109/PPPS.2007.4345830

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@inproceedings{e8b906dd7a2c47f9b929bbe3d4ad993c,

title = "BIOACTIVITY AND CORROSION RESISTANCE OF NITI AFTER CALCIUM PLASMA IMMERSION ION IMPLANTATION",

abstract = "Summary form only given. Plasma immersion ion implantation (PHI) is an effective approach to enhance the surface properties of various types of biomaterials. In order to enhance the surface bioactivity and corrosion resistance of NiTi shape memory alloy, calcium ions were implanted into NiTi alloys that have been pre-plasma-implanted with oxygen and nitrogen. The results are compared to samples without pre-treatment. The bioactivity of calcium-implanted NiTi was evaluated by immersion tests in simulated body fluid (SBF). The surface of NiTi before and after immersion tests was characterized by X-ray photoelectron spectroscopy (XPS). The XPS results reveal that the structure of the calcium-implanted layer in all the samples is composed of calcium oxide and gradually becomes a Ca-P layer after a period incubation in SBF. This Ca-P film also can be detected by scanning electron microscopy (SEM). To evaluate the anti-corrosion performance of NiTi, electrochemical potentiodynamic polarization tests were conducted on the NiTi samples in SBF. NiTi samples with pre-oxygen and nitrogen plasma implantation exhibit better corrosion resistance than single calcium-implanted samples. Our results indicate that calcium implantation can enhance the bioactivity of NiTi alloy due to the formation of calcium phosphate on the surface of the alloy. Plasma ion implantation can also improve the corrosion resistance of NiTi.",

author = "Liu, \{X. M.\} and Wu, \{S. L.\} and Chu, \{Paul K.\} and Chan, \{Y. L.\} and Chung, \{C. Y.\} and Chu, \{C. L.\} and Yeung, \{K. W. K.\} and Lu, \{W. W.\} and Cheung, \{K. M. C.\} and Luk, \{K. D. K.\}",

year = "2007",

month = jun,

doi = "10.1109/PPPS.2007.4345830",

language = "English",

isbn = "9781424409150",

publisher = "IEEE",

pages = "524",

booktitle = "2007 IEEE 34th International Conference on Plasma Science (ICOPS)",

address = "United States",

note = "2007 IEEE Pulsed Power and Plasma Science Conference, PPPS-2007 (34th IEEE International Conference on Plasma Science and 16th IEEE International Pulsed Power Conference), PPPS-2007, IPPC07 ; Conference date: 17-06-2007 Through 22-06-2007",

url = "http://ece-events.unm.edu/ppps2007/",

}

Liu, XM, Wu, SL, Chu, PK, Chan, YL, Chung, CY, Chu, CL, Yeung, KWK, Lu, WW, Cheung, KMC & Luk, KDK 2007, BIOACTIVITY AND CORROSION RESISTANCE OF NITI AFTER CALCIUM PLASMA IMMERSION ION IMPLANTATION. in 2007 IEEE 34th International Conference on Plasma Science (ICOPS). IEEE, pp. 524, 2007 IEEE Pulsed Power and Plasma Science Conference, PPPS-2007 (34th IEEE International Conference on Plasma Science and 16th IEEE International Pulsed Power Conference), Albuquerque, New Mexico, United States, 17/06/07. https://doi.org/10.1109/PPPS.2007.4345830

BIOACTIVITY AND CORROSION RESISTANCE OF NITI AFTER CALCIUM PLASMA IMMERSION ION IMPLANTATION. / Liu, X. M.; Wu, S. L.; Chu, Paul K. et al.
2007 IEEE 34th International Conference on Plasma Science (ICOPS). IEEE, 2007. p. 524.

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

TY - GEN

T1 - BIOACTIVITY AND CORROSION RESISTANCE OF NITI AFTER CALCIUM PLASMA IMMERSION ION IMPLANTATION

AU - Liu, X. M.

AU - Wu, S. L.

AU - Chu, Paul K.

AU - Chan, Y. L.

AU - Chung, C. Y.

AU - Chu, C. L.

AU - Yeung, K. W. K.

AU - Lu, W. W.

AU - Cheung, K. M. C.

AU - Luk, K. D. K.

PY - 2007/6

Y1 - 2007/6

N2 - Summary form only given. Plasma immersion ion implantation (PHI) is an effective approach to enhance the surface properties of various types of biomaterials. In order to enhance the surface bioactivity and corrosion resistance of NiTi shape memory alloy, calcium ions were implanted into NiTi alloys that have been pre-plasma-implanted with oxygen and nitrogen. The results are compared to samples without pre-treatment. The bioactivity of calcium-implanted NiTi was evaluated by immersion tests in simulated body fluid (SBF). The surface of NiTi before and after immersion tests was characterized by X-ray photoelectron spectroscopy (XPS). The XPS results reveal that the structure of the calcium-implanted layer in all the samples is composed of calcium oxide and gradually becomes a Ca-P layer after a period incubation in SBF. This Ca-P film also can be detected by scanning electron microscopy (SEM). To evaluate the anti-corrosion performance of NiTi, electrochemical potentiodynamic polarization tests were conducted on the NiTi samples in SBF. NiTi samples with pre-oxygen and nitrogen plasma implantation exhibit better corrosion resistance than single calcium-implanted samples. Our results indicate that calcium implantation can enhance the bioactivity of NiTi alloy due to the formation of calcium phosphate on the surface of the alloy. Plasma ion implantation can also improve the corrosion resistance of NiTi.

AB - Summary form only given. Plasma immersion ion implantation (PHI) is an effective approach to enhance the surface properties of various types of biomaterials. In order to enhance the surface bioactivity and corrosion resistance of NiTi shape memory alloy, calcium ions were implanted into NiTi alloys that have been pre-plasma-implanted with oxygen and nitrogen. The results are compared to samples without pre-treatment. The bioactivity of calcium-implanted NiTi was evaluated by immersion tests in simulated body fluid (SBF). The surface of NiTi before and after immersion tests was characterized by X-ray photoelectron spectroscopy (XPS). The XPS results reveal that the structure of the calcium-implanted layer in all the samples is composed of calcium oxide and gradually becomes a Ca-P layer after a period incubation in SBF. This Ca-P film also can be detected by scanning electron microscopy (SEM). To evaluate the anti-corrosion performance of NiTi, electrochemical potentiodynamic polarization tests were conducted on the NiTi samples in SBF. NiTi samples with pre-oxygen and nitrogen plasma implantation exhibit better corrosion resistance than single calcium-implanted samples. Our results indicate that calcium implantation can enhance the bioactivity of NiTi alloy due to the formation of calcium phosphate on the surface of the alloy. Plasma ion implantation can also improve the corrosion resistance of NiTi.

U2 - 10.1109/PPPS.2007.4345830

DO - 10.1109/PPPS.2007.4345830

M3 - RGC 32 - Refereed conference paper (with host publication)

SN - 9781424409150

SP - 524

BT - 2007 IEEE 34th International Conference on Plasma Science (ICOPS)

PB - IEEE

T2 - 2007 IEEE Pulsed Power and Plasma Science Conference, PPPS-2007 (34th IEEE International Conference on Plasma Science and 16th IEEE International Pulsed Power Conference)

Y2 - 17 June 2007 through 22 June 2007

ER -

BIOACTIVITY AND CORROSION RESISTANCE OF NITI AFTER CALCIUM PLASMA IMMERSION ION IMPLANTATION

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