• Title/Summary/Keyword: 용사법

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Experimental Study on the Corrosion Behavior of Al Coatings Applied by Plasma Thermal Arc Spray under Simulated Environmental Conditions (모사 부식 환경에서 플라즈마 아크용사에 의한 Al 코팅의 부식특성에 관한 실험적 연구)

  • Jeong, Hwa-Rang
    • Journal of the Korea Institute of Building Construction
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    • v.23 no.5
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    • pp.559-570
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    • 2023
  • The corrosion of structural steel used in the construction industry is increasing due to the industrialization where many aggressive ions released in the atmosphere. Therefore, in the present study Al coating was deposited by arc and plasma arc thermal spray process and compared their effectiveness in simulated weathering condition i.e. Society of Automotive Engineers(SAE) J2334 solution which mostly contain Cl- and CO32- ions. Different analytical techniques have been used to characterize the coating and draw the corrosion mechanism. The Al coating deposited by plasma arc thermal spray process exhibited uniform, dense and layer by layer deposition resulting higher bond adhesion values. The open circuit potential(OCP) of Al coating deposited this process is exhibited more electropositive values than arc thermal spray process in SAE J2334 solution with immersion periods. The total impedance of plasma arc thermal spray process exhibited higher than arc thermal spray process. The corrosion rate of the plasma arc thermal sprayed Al coating is reduced by 20% compared to arc thermal spray process after 23 days of immersion in SAE J2334 solution.

Fabrication of Al/Al-SiC Composites by Thermal Spray Process (용사법에 의한 Al/Al-SiC 복합재료의 제조)

  • Kim, K.T.;Kim, Y.S.
    • Journal of Power System Engineering
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    • v.10 no.2
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    • pp.93-98
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    • 2006
  • Metal matrix composites(MMCs) reinforced with ceramic particulates are receiving increasing attention because their high specific strength, low coefficient of thermal expansion and excellent wear resistance. Especially, Al-based composites(AMCs) have been widely applied for the aerospace and automotive industries. Such composites are mainly fabricated by the cast, powder metallurgy and infiltration process. In this study, SiC particulate reinforced Al-based composites were fabricated by thermal spray process and their wear behavior were investigated. Composites with different spray parameter were fabricated by using flame spray apparatus. Microstructure and wear behavior of the composites were observed by scanning electron microscope(SEM) and electron probe micro-analysis(EPMA).

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Effects of Solid Lubricants on friction and wear behaviors of APSed Al2O3-ZrO2 Ceramic Composites Coating (대기플라즈마 용사법으로 제작된 알루미나-지르코니아 세라믹스 코팅층의 마찰마모거동에 고체윤활체의 효과)

  • Kim, Seong-Ho;Jeong, Sang-Hun;Lee, Sol-Bin;Lee, Su-Wan
    • Proceedings of the Korean Institute of Surface Engineering Conference
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    • 2014.11a
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    • pp.296-297
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    • 2014
  • 고체윤활제는 고온부품의 응용에 매우 적합한 소재이다. 세라믹스를 기반으로 하는 고온저마찰소재는 우주항공, 발전시설 등과 같은 다양한 분야에서 매우 중요하다. 본 연구는 고온저마찰 소재를 가지는 자기윤활 $Al_2O_3-ZrO_2$ 세라믹 복합 코팅층의 마찰마모거동에 초점을 맞추고 있다. 이 자기윤활 $Al_2O_3-ZrO_2$ 세라믹 복합 코팅층은 대기플라즈마 용사법으로 제작하였으며, 비윤활상태에서 마찰마모거동을 조사하였다.

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