Abstract
The results of microstructural and tribological studies performed on sputter-deposited coatings of ZrO 2·2OY 2O 3, TiB 2 and B-18wt.%Si are reported. In each case, deposition parameters were identified that offered good tribological properties while maintaining low deposition temperatures (below 400 °C) to avoid distortion and softening of previously heat-treated substrates. Zirconia deposits were prepared with a pronounced columnar microstructure that provided excellent thermal fatigue and wear resistance, making them candidates for heat engine applications. The TiB 2 coatings were the hardest coatings prepared. These provided good wear resistance on steel substrates. The B-Si coating displayed excellent wear resistance and good adherence to copper and aluminum alloys.
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