发明申请
US20060029830A1 NbSi-2 base nanocomposite coating and manufacturing method thereof
审中-公开
NbSi-2基复合纳米复合涂层及其制备方法
- 专利标题: NbSi-2 base nanocomposite coating and manufacturing method thereof
- 专利标题(中): NbSi-2基复合纳米复合涂层及其制备方法
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申请号: US11023463申请日: 2004-12-29
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公开(公告)号: US20060029830A1公开(公告)日: 2006-02-09
- 发明人: Jin-Kook Yoon , Gyeung-Ho Kim , Kyung-Tae Hong , Jung-Man Doh , Jong-Kwon Lee , Kyung-Hwan Lee , Keun-Hyung Son
- 申请人: Jin-Kook Yoon , Gyeung-Ho Kim , Kyung-Tae Hong , Jung-Man Doh , Jong-Kwon Lee , Kyung-Hwan Lee , Keun-Hyung Son
- 申请人地址: KR Seoul
- 专利权人: Korea Institute of Science and Technology
- 当前专利权人: Korea Institute of Science and Technology
- 当前专利权人地址: KR Seoul
- 优先权: KR61786/2004 20040805
- 主分类号: B32B19/00
- IPC分类号: B32B19/00 ; B32B9/00 ; C23C16/26
摘要:
A NbSi2-base nanocomposite coating formed on the surface of niobium or niobium-base alloys is disclosed. The nanocomposite coating layer is manufactured by forming a niobium carbide layers or a niobium nitride layers by depositing of carbon or nitrogen on the surface, and then depositing silicon. The nanocomposite coating layer has a microstructure that SiC or Si3N4 particles are mostly precipitated on an equiaxed NbSi2 grain boundary. The thermal expansion coefficients of NbSi2-base nanocomposite coating layers become close to that of the substrates by adjusting the volume fraction of SiC or Si3N4 particles in the nanocomposite coating layers. Accordingly, the generation of cracks caused by thermal stress due to the mismatch in thermal expansion coefficient between the NbSi2-base nanocomposite coatings and the substrates can be suppressed, thereby improving the high-temperature oxidation resistance in the repeated thermal cycling use of the NbSi2-base nanocomposite coated substrates. Further, the increase in the volume fraction of dense SiO2 oxide phase formed on the surface of the NbSi2-base nanocomposite coating layers improves also high-temperature isothermal oxidation resistance.