- Effect of Heat Treatment Environment on the Densification of Cold Sprayed Ti Coating Layer
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Ji-Sang Yu, Hyung-Jun Kim, Ik-Hyun Oh, Kee-Ahn Lee
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J Korean Powder Metall Inst. 2012;19(2):110-116.
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DOI: https://doi.org/10.4150/KPMI.2012.19.2.110
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- This study investigated the effects of annealing environment for the densification and purification properties of pure titanium coating layer manufactured by cold spraying. The annealing was conducted at 600°C/1 h and three kinds of environments of vacuum, Ar gas, and 5%H_2+Ar mixture gas were controlled. Cold sprayed Ti coating layer (as sprayed) represented 6.7% of porosity and 228 HV of hardness, showing elongated particle shapes (severe plastic deformation) perpendicular to injection direction. Regardless of gas environments, all thermally heat treated coating layers consisted of pure alpha-Ti and minimal oxide. Vacuum environment during heat treatment represented superior densification properties (3.8% porosity, 156.7 HV) to those of Ar gas (5.3%, 144.5 HV) and 5%H_2+Ar mixture gas (5.5%, 153.1 HV). From the results of phase analysis (XRD, EPMA, SEM, EDS), it was found that the vacuum environment during heat treatment could be effective for reducing oxide contents (purification) in the Ti coating layer. The characteristic of microstructural evolution with heat treatment was found to be different at three different gas environments. The controlling method for improving densification and purification in the cold sprayed Ti coating material was also discussed.
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Citations
Citations to this article as recorded by  - Effect of Hot Isostatic Pressing on the Microstructure and Propertiesof Kinetic Sprayed Nb Coating Material
Ji-Hye Lee, Sangsun Yang, Kee-Ahn Lee
Journal of Korean Powder Metallurgy Institute.2016; 23(1): 15. CrossRef - Fabrication and Microstructure/Properties of Bulk-typeTantalum Material by a Kinetic Spray Process
Ji-Hye Lee, Ji-Won Kim, Kee-Ahn Lee
Journal of Korean Powder Metallurgy Institute.2016; 23(1): 8. CrossRef - Effect of Heat Treatment Environment on the Microstructure and Properties of Kinetic Sprayed Tantalum Coating Layer
Ji-Hye Lee, Hyung-Jun Kim, Kee-Ahn Lee
Journal of Korean Powder Metallurgy Institute.2015; 22(1): 32. CrossRef - Effect of Powder Preheating Temperature on the Properties of Titanium Coating Layers Manufactured by Kinetic Spraying
Kee-Ahn Lee, Myeong-Ju Lee, Ji-Sang Yu, Hyung-Jun Kim
MATERIALS TRANSACTIONS.2014; 55(3): 622. CrossRef - Effect of Carrier Gases on the Microstructure and Properties of Ti Coating Layers Manufactured by Cold Spraying
Myeong-Ju Lee, Hyung-Jun Kim, Ik-Hyun Oh, Kee-Ahn Lee
Journal of Korean Powder Metallurgy Institute.2013; 20(1): 24. CrossRef - Effects of Powder Morphology and Powder Preheating on the Properties and Deposition Behavior of Titanium Coating Layer Manufactured by Cold Spraying
Jae-Nam Hwang, Myeong-Ju Lee, Hyung-Jun Kim, Ik-Hyun Oh, Kee-Ahn Lee
Journal of Korean Powder Metallurgy Institute.2012; 19(5): 348. CrossRef
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