Thermal properties of VPS-W coatings on CuCrZr alloy with Ti bonding layer

Tungsten coating of 0.2 mm thickness was successfully deposited by vacuum plasma spraying technique on CuCrZr alloy with Ti bonding layer. Microstructure and chemical composition of deposited W were examined. Its thermal response and thermal fatigue properties were studied with active cooling. No cracks and no exfoliation occurred on the W surface after thermal response test with a heat flux from 0 to 8 MW/m2. It survived up to 200 cycles under 8 MW/m2. These results indicate that VPS-W coated Ti/CuCrZr is a potential candidate for a high heat resistance armor material on plasma facing components.