Mechanical properties, deformation behaviors and interface adhesion of (AlCrTaTiZr)Nx multi-component coatings

✍ Scribed by Shou-Yi Chang; Shao-Yi Lin; Yi-Chung Huang; Chia-Liang Wu

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 912 KB
• Volume: 204
• Category: Article
• ISSN: 0257-8972
• DOI: 10.1016/j.surfcoat.2010.03.041

✦ Synopsis

In this study, (AlCrTaTiZr)N x multi-component coatings with quinary metallic elements were developed as protective hard coatings for tribological application. The mechanical properties, creep behaviors, deformation mechanisms and interface adhesion of the (AlCrTaTiZr)N x coatings with different N contents were characterized. With increasing the N 2 -to-total (N 2 + Ar) flow ratio, R N , during sputtering deposition, the (AlCrTaTiZr)N x coatings transformed from an amorphous metallic phase to a nanocomposite and finally a crystalline nitride structure. The hardness of the coatings accordingly increased from 13 GPa to a high value of about 30 GPa, but the creep strain rate also increased from 1.3 × 10 -4 to 7.3 × 10 -4 1/s. The plastic deformation of the amorphous metallic coating deposited with R N = 0% proceeded through the formation and extension of shear bands, whereas dislocation activities dominated the deformation behavior of the crystalline nitride coatings deposited with R N = 10% and 30%. With increasing R N , the interface adhesion energy between the coatings and the substrates was also enhanced from 6.1 to 22.9 J/m 2 .