Plasma spraying of hydroxyapatite(HA)/Ti-6Al-4V composite coatings
Biomedical implants using metals, polymers, ceramics and composites are increasingly being used to restore body function and to facilitate healing. It is often the material design aspect of such implants that will determine the stability of the device. Hydroxyapatite (HA) coating on Ti-6A1-4V is a p...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
2008
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| Online Access: | http://hdl.handle.net/10356/13447 |
| _version_ | 1826109558217506816 |
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| author | Quek, Chai Hia. |
| author2 | Khor, Khiam Aik |
| author_facet | Khor, Khiam Aik Quek, Chai Hia. |
| author_sort | Quek, Chai Hia. |
| collection | NTU |
| description | Biomedical implants using metals, polymers, ceramics and composites are increasingly being used to restore body function and to facilitate healing. It is often the material design aspect of such implants that will determine the stability of the device. Hydroxyapatite (HA) coating on Ti-6A1-4V is a promising implant being used in the orthopaedics applications. HA is a bioactive but brittle material. Ti-6A1-4V is non-toxic, bioinert and mechanically strong. HA and Ti-6A1-4V provide an implant that is biocompatible, light and stable. Plasma spray technique is a popular method of depositing HA on Ti-6A1-4V. To bridge the gap in biomaterials with HA having low load bearing, Ti-6A1-4V is combined with HA to provide a higher load bearing capability. The deposition of brittle HA alone gives a coating with the tendency to crack. HA/Ti-6A1-4V composite coatings which bring together the bioactive HA with the bioinert Ti-6A1-4V are therefore developed. Two different compositions of HA and Ti-6A1-4V in the ratio of 50 wt.% HA : 50 wt.% Ti-6A1-4V and 80 wt.% HA : 20 wt.% Ti-6A1-4V are produced by a ceramic slurry mixing method. The influence of plasma spraying parameters such as plasma arc current, plasma gun transverse speed, standoff distance and helium gas flow rate, on the coating characteristics are studied. |
| first_indexed | 2024-10-01T02:20:12Z |
| format | Thesis |
| id | ntu-10356/13447 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:20:12Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | ntu-10356/134472023-03-11T16:56:38Z Plasma spraying of hydroxyapatite(HA)/Ti-6Al-4V composite coatings Quek, Chai Hia. Khor, Khiam Aik School of Mechanical and Production Engineering DRNTU::Engineering::Materials::Composite materials DRNTU::Engineering::Materials::Plasma treatment Biomedical implants using metals, polymers, ceramics and composites are increasingly being used to restore body function and to facilitate healing. It is often the material design aspect of such implants that will determine the stability of the device. Hydroxyapatite (HA) coating on Ti-6A1-4V is a promising implant being used in the orthopaedics applications. HA is a bioactive but brittle material. Ti-6A1-4V is non-toxic, bioinert and mechanically strong. HA and Ti-6A1-4V provide an implant that is biocompatible, light and stable. Plasma spray technique is a popular method of depositing HA on Ti-6A1-4V. To bridge the gap in biomaterials with HA having low load bearing, Ti-6A1-4V is combined with HA to provide a higher load bearing capability. The deposition of brittle HA alone gives a coating with the tendency to crack. HA/Ti-6A1-4V composite coatings which bring together the bioactive HA with the bioinert Ti-6A1-4V are therefore developed. Two different compositions of HA and Ti-6A1-4V in the ratio of 50 wt.% HA : 50 wt.% Ti-6A1-4V and 80 wt.% HA : 20 wt.% Ti-6A1-4V are produced by a ceramic slurry mixing method. The influence of plasma spraying parameters such as plasma arc current, plasma gun transverse speed, standoff distance and helium gas flow rate, on the coating characteristics are studied. Master of Engineering (MPE) 2008-10-20T08:18:36Z 2008-10-20T08:18:36Z 1999 1999 Thesis http://hdl.handle.net/10356/13447 en 240 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Materials::Composite materials DRNTU::Engineering::Materials::Plasma treatment Quek, Chai Hia. Plasma spraying of hydroxyapatite(HA)/Ti-6Al-4V composite coatings |
| title | Plasma spraying of hydroxyapatite(HA)/Ti-6Al-4V composite coatings |
| title_full | Plasma spraying of hydroxyapatite(HA)/Ti-6Al-4V composite coatings |
| title_fullStr | Plasma spraying of hydroxyapatite(HA)/Ti-6Al-4V composite coatings |
| title_full_unstemmed | Plasma spraying of hydroxyapatite(HA)/Ti-6Al-4V composite coatings |
| title_short | Plasma spraying of hydroxyapatite(HA)/Ti-6Al-4V composite coatings |
| title_sort | plasma spraying of hydroxyapatite ha ti 6al 4v composite coatings |
| topic | DRNTU::Engineering::Materials::Composite materials DRNTU::Engineering::Materials::Plasma treatment |
| url | http://hdl.handle.net/10356/13447 |
| work_keys_str_mv | AT quekchaihia plasmasprayingofhydroxyapatitehati6al4vcompositecoatings |