| Title |
Adhesion , Hardness and Wear resistance of the Sputtered ZrN Coating with Ni Interlayer |
| Authors |
예길촌(Gil Chon Ye); 신현준(Hyue Jun Shin); 권식철(Sik Chol Kwon); 백운승(Woon Seung Baek) |
| Abstract |
ZrN coatings were deposited on tool steel(SKH9) with the interlayer of Ni by a reactive D.C. magnetron sputtering. The microhardness, adhesion strength and wear-resistance of the films were investigated with microhardness tester, scratch tester, pin-on-disk method respectively. ZrN coatings were deposited with the condition of partial pressures of N2 gas(4∼10x10-4mbar) and the substrate bias voltage(0∼250V). The microhardness decreased from HV 1050 ㎏/㎜2 to HV 1000㎏/㎜2 as the thickness of Ni interlayer increased from 0.2 ㎛ to 1.3 ㎛. The adhesion strength of the Ni/ZrN double-layered coatings were 22N in the scratch test and it was four times higher than that of ZrN mono-layered coatings. The failure mode of the double-layered coatings was changed from the cohesive at the initial stage to the adhesive failure in the later stage of the failure. The wear-resistance of the Ni/ZrN double-layered coatings increased nearly twice as high as that of the ZrN mono-layered coatings. |