| Yazarlar |
Islak S.
|
|
Buytoz S.
|
|
Ersoz E.
|
|
Orhan N.
|
|
Stokes J.
|
|
Hashmi M. Saleem
|
|
Somunkiran I.
|
|
Tosun N.
|
| Özet |
| In this study, Al2O3-TiO2 composite coatings were thermally sprayed on the SAE 1040 steel using atmospheric plasma spray (APS) process of mixed different rates micron-sized TiO2 and micron-sized Al2O3 powders. The effects of TiO2 addition on the microstructure, phase compositions and microhardness of the coatings were investigated by using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffractometry (XRD) and microhardness tester. The results show that the Al2O3-TiO2 composite coatings consists of both fully melted regions and partially melted regions, and the fully melted region has a lamellar-like structure. Phase transformations from mainly stable a-Al2O3 and anatase-TiO2 in the powders to predominant rnetastable y-Al2O3, rutile-TiO2 and Al2TiO5 phase in the Al2O3-TiO2 composite coatings were observed. It was determined that the pore content decreased with the increased in the TiO2 powder rate. The microhardness of the coating layers was 3-4.5 times higher than substrate material. The average microhardness values of the coatings were found to reach 650-860 HV. |
| Anahtar Kelimeler |
| Plasma spray,Ceramic coating,gamma-Al2O3,Rutile-TiO2 |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale |
| Dergi Adı | OPTOELECTRONICS AND ADVANCED MATERIALS-RAPID COMMUNICATIONS |
| Dergi Tarandığı Indeksler | SCI-Expanded |
| Makale Dili | İngilizce |
| Basım Tarihi | 09-2012 |
| Cilt No | 6 |
| Sayı | 9 |
| Sayfalar | 844 / 849 |
