发明名称 |
SILICON NITRIDE CERAMIC HAVING RARE EARTH ALUMINATE-BASED HIGH TEMPERATURE CORROSION RESISTANT LAYER |
摘要 |
PROBLEM TO BE SOLVED: To provide a silicon nitride ceramic having a high temperature corrosion resistant coating film and its manufacturing method. SOLUTION: The silicon nitride ceramic having a corrosion resistant layer comprising a multiple oxide of a rare earth oxide and alumina and their multi-phase composition has a high temperature corrosion resistant layer having a composition between Ln<SB>4</SB>Al<SB>2</SB>O<SB>9</SB>and Ln<SB>3</SB>Al<SB>5</SB>O<SB>12</SB>(Ln expresses a rare earth) in which the atomic ratio Ln:Al is 1:(0.5-5/3). The silicon nitride ceramic is manufactured by film-forming a dense rare earth aluminate layer having 0.1-10μm film thickness on a base material by a vapor phase method or a liquid phase method and further forming the corrosion resistant layer having 0-200μm film thickness and comprising a rare earth aluminate having the composition between Ln<SB>4</SB>Al<SB>2</SB>O<SB>9</SB>and Ln<SB>3</SB>Al<SB>5</SB>O<SB>12</SB>(Ln expresses rare earth) and their multi-phase composition. COPYRIGHT: (C)2005,JPO&NCIPI
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申请公布号 |
JP2005008490(A) |
申请公布日期 |
2005.01.13 |
申请号 |
JP20030175795 |
申请日期 |
2003.06.20 |
申请人 |
NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL & TECHNOLOGY |
发明人 |
UENO SHUNKICHI;DANIEL DONI JAYASEELAN;OJI TATSUKI;KANZAKI SHUZO |
分类号 |
C04B41/87;C23C14/08;(IPC1-7):C04B41/87 |
主分类号 |
C04B41/87 |
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