发明名称 |
Method of obtaining surface coating of silicon nitride (SI3N4) on ceramic components and parts |
摘要 |
A process of obtaining silicon nitride (Si3N4) surface coatings on ceramic pieces and components by impregnation of the surfaces of the ceramic pieces with silicon powder suspensions with a particle size preferably less than 200 mu m. The thickness of the coatings depends on the impregnation time and on the properties of the slip and the ceramic piece. The subsequent nitridation of the coating by thermal treatment at temperatures between 1300 DEG C and 1500 DEG C in N2 atmospheres leads to a continuous Si3N4 coating. The chemical stability and compatibility between Si3N4 and molten silicon enables its application in silicon metallurgy, in manufacturing crucibles for silicon fusion or for housing said molten silicon, in manufacturing pipes and chutes for its transport or in manufacturing different components for its subsequent purification. <IMAGE> |
申请公布号 |
ZA200506574(B) |
申请公布日期 |
2006.12.27 |
申请号 |
ZA20050006574 |
申请日期 |
2005.08.17 |
申请人 |
UNIVERSIDADE DE SANTIAGO DE COMPOSTELA |
发明人 |
SOUTO SERANTES, ALEJANDRO;GUITISN RIVERA, FRANCISCO;BULLON CAMARASA, JAVIER |
分类号 |
C04B;C04B35/591;C04B41/50;C04B41/87;C23C8/02 |
主分类号 |
C04B |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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