• Title/Summary/Keyword: 용사층

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Preparation of Al-SiCp Composite Coating by Plasma Thermal Spray (플라즈마 용사에 의한 Al-SiCp 복합재료 코팅층의 제조)

  • 민준원;유승을;김영정;김정석;서동수
    • Journal of the Korean Ceramic Society
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    • v.40 no.5
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    • pp.460-467
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    • 2003

  • Al-SiC$_{p}$ composite layer was prepared by plasma thermal spray on aluminum substrate using composite powder prepared by mechanical alloying. Mechanically alloyed powder was achieved after 24 h milling, which was used for thermal spray coating. The correlations between process conditions and thickness/porosity were analyzed, and increase of hardness was confirmed. The presence of Al-Si-C-O compound was detected by TEM analysis.

  • https://doi.org/10.4191/KCERS.2003.40.5.460 인용 PDF KSCI

Fabrication and Microstructure of Hydroxyapatite Coating Layer by Plasma Spraying (플라즈마 용사법에 의한 Hydroxyapatite코팅층의 제조와 미세구조)

  • 이치우;오익현;이형근;이병택
    • Journal of the Korean Ceramic Society
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    • v.41 no.3
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    • pp.259-265
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    • 2004

  • The microstructure of nano-sized hydroxyapatite (HAp) powders coating layer on ZrO$_2$ substrate was investigated, which was formed by plasma spray process. The nano-sized HAp powders were successfully synthesized by precipitation of Ca(NO$_3$)$_2$$.$4H$_2$O and (NH$_4$)$_2$HPO$_4$ solution. The HAp coating layer with thickness of 150∼250 $\mu\textrm{m}$ was free from the cracks at interfaces between the coating and ZrO$_2$ substrate. In the plasma sprayed HAp coating layer, the undesirable phases were not found, while in the HAp coating layer heat-treated at 800$^{\circ}C$, TTCP, and ${\beta}$-TCP phase were detected as well as HAp phase. However, at 900$^{\circ}C$, they were completely disappeared. At 1100$^{\circ}C$, XRD analysis revealed that the coating layer was composed of the highly crystallized HAp.

  • https://doi.org/10.4191/KCERS.2004.41.3.259 인용 PDF KSCI