Kinetic Spray 공정으로 제조된 탄탈륨 코팅층의 열처리 분위기에 따른 미세조직 및 물성
Effect of Heat Treatment Environment on the Microstructure and Properties of Kinetic Sprayed Tantalum Coating Layer
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The effect of heat treatment environment on the microstructure and properties of tantalum coating layer manufacturedby kinetic spraying was examined. Heat treatments are conducted for one hour at 800oC, 900oC, and 1000oC in two differentenvironments of vacuum and Ar gas. Evaluation of microstructure and physical properties are conducted. High density α-tantalum single phase coating layer with a porosity of 0.04% and hardness of 550 Hv can be obtained. As heat treatment temperatureincreases, porosity identically decreases regardless of heat treatment environment (vacuum and Ar gas). Hardness ofheat treated coating layer especially in Ar gas environment deceases from 550 Hv to 490 Hv with increasing heat treatment temperature. That in vacuum environment deceases from 550 Hv to 530 Hv. The boundary between particles became vague as heattreatment temperature increases. Oxygen distribution of tantalum coating layer is minute after heat treatment in vacuum environmentthan Ar gas environment.
Abstract
The effect of heat treatment environment on the microstructure and properties of tantalum coating layer manufacturedby kinetic spraying was examined. Heat treatments are conducted for one hour at 800oC, 900oC, and 1000oC in two differentenvironments of vacuum and Ar gas. Evaluation of microstructure and physical properties are conducted. High density α-tantalum single phase coating layer with a porosity of 0.04% and hardness of 550 Hv can be obtained. As heat treatment temperatureincreases, porosity identically decreases regardless of heat treatment environment (vacuum and Ar gas). Hardness ofheat treated coating layer especially in Ar gas environment deceases from 550 Hv to 490 Hv with increasing heat treatment temperature. That in vacuum environment deceases from 550 Hv to 530 Hv. The boundary between particles became vague as heattreatment temperature increases. Oxygen distribution of tantalum coating layer is minute after heat treatment in vacuum environmentthan Ar gas environment.
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