| Titre : | Microstructure and tribological properties of ZrB2-containing composite coating produced on pure Ti substrate by laser surface alloying (2012) |
| Auteurs : | Chun Guo, Auteur ; Jiansong Zhou, Auteur ; Jierong Zhao, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Transactions of the ASME . Journal of tribology (Vol. 133 N° 1, Janvier 2011) |
| Article en page(s) : | 07 p. |
| Note générale : | Tribology |
| Langues : | Anglais |
| Index. décimale : | 621.5 (Energie pneumatique. Machinerie et outils. Réfrigération) |
| Tags : | Abrasion Adhesion Coatings Crystal microstructure Fatigue Microhardness Plastic deformation Acanning electron microscopy Sliding friction Surface alloying Wear resistance X-ray diffraction Zirconium compounds |
| Résumé : | ZrB2-containing composite coating was fabricated on pure Ti substrate by laser surface alloying. The microstructure of the composite coating was investigated by means of X-ray diffraction and scanning electron microscopy (SEM). The friction and wear properties of ZrB2-containing composite coating sliding against a GCr15 steel ball at different normal loads and sliding speeds were evaluated. The morphologies of the worn surfaces were analyzed by means of SEM and three dimensional noncontact surface mapping. It is shown that the microhardness and wear resistance of the pure Ti substrate are greatly increased after laser surface alloying, due to the formation of hard ZrB2 phase in the composite coating. Pure Ti substrate sliding against the GCr15 counterpart ball at room temperature is dominated by adhesion wear, abrasive wear, and severe plastic deformation, while ZrB2-containing composite coating involves only mild abrasive and fatigue wear when sliding against the GCr15 counterpart. |
| DEWEY : | 621.5 |
| ISSN : | 0742-4787 |
| En ligne : | http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JOTRE9000133000001011301000001&idtype=cvips&gifs=Yes&ref=no |
