Characterisation of thermally sprayed coatings
Thermally sprayed coatings have some of the most complex microstructures tbund in Material Science. The multifaceted structures comprise lamellae splats, non-metallic inclusions, micro and macropores as well as unfused particulates. The extent of this microstructural inhomogenity is expected to exer...
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| Format: | Thesis |
| Language: | English |
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2009
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| Online Access: | http://hdl.handle.net/10356/20460 |
| _version_ | 1811693134499807232 |
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| author | Ooi, Thian Ngan. |
| author2 | Cheang, Philip Hong Ning |
| author_facet | Cheang, Philip Hong Ning Ooi, Thian Ngan. |
| author_sort | Ooi, Thian Ngan. |
| collection | NTU |
| description | Thermally sprayed coatings have some of the most complex microstructures tbund in Material Science. The multifaceted structures comprise lamellae splats, non-metallic inclusions, micro and macropores as well as unfused particulates. The extent of this microstructural inhomogenity is expected to exert considerable influence on coating properties. The use of Backscattered Electron Modal Analysis (BEMA) provides a fast and convenient alternative to perform quantitative analysis on the microstructure of plasma sprayed coatings. Sufficiently good elemental discrimination can be achieved because of the sensitivity of backscattered electrons (BE) to atomic number variations. Variations in the percentage of oxides. holes and phases as a result of different spraying conditions or powder characteristics are generally observable from the spatial profile of BE spectrum. The ability to detect minute microstructural variations as a function of spray parameters provides a promising technique of optimizing the quality of thermally sprayed coatings. |
| first_indexed | 2024-10-01T06:46:51Z |
| format | Thesis |
| id | ntu-10356/20460 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:46:51Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | ntu-10356/204602020-09-27T20:17:36Z Characterisation of thermally sprayed coatings Ooi, Thian Ngan. Cheang, Philip Hong Ning School of Applied Science DRNTU::Engineering::Materials::Plasma treatment Thermally sprayed coatings have some of the most complex microstructures tbund in Material Science. The multifaceted structures comprise lamellae splats, non-metallic inclusions, micro and macropores as well as unfused particulates. The extent of this microstructural inhomogenity is expected to exert considerable influence on coating properties. The use of Backscattered Electron Modal Analysis (BEMA) provides a fast and convenient alternative to perform quantitative analysis on the microstructure of plasma sprayed coatings. Sufficiently good elemental discrimination can be achieved because of the sensitivity of backscattered electrons (BE) to atomic number variations. Variations in the percentage of oxides. holes and phases as a result of different spraying conditions or powder characteristics are generally observable from the spatial profile of BE spectrum. The ability to detect minute microstructural variations as a function of spray parameters provides a promising technique of optimizing the quality of thermally sprayed coatings. Master of Applied Science 2009-12-15T03:03:57Z 2009-12-15T03:03:57Z 1997 1997 Thesis http://hdl.handle.net/10356/20460 en NANYANG TECHNOLOGICAL UNIVERSITY 168 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Materials::Plasma treatment Ooi, Thian Ngan. Characterisation of thermally sprayed coatings |
| title | Characterisation of thermally sprayed coatings |
| title_full | Characterisation of thermally sprayed coatings |
| title_fullStr | Characterisation of thermally sprayed coatings |
| title_full_unstemmed | Characterisation of thermally sprayed coatings |
| title_short | Characterisation of thermally sprayed coatings |
| title_sort | characterisation of thermally sprayed coatings |
| topic | DRNTU::Engineering::Materials::Plasma treatment |
| url | http://hdl.handle.net/10356/20460 |
| work_keys_str_mv | AT ooithianngan characterisationofthermallysprayedcoatings |