C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
25/132
C04B 35/64 (2006.01) B22F 3/12 (2006.01) B28B 3/00 (2006.01) C04B 35/575 (2006.01) C04B 35/593 (2006.01) C04B 35/645 (2006.01)
Patent
CA 1259169
IMPROVED PROCESS FOR COMPACTING A POROUS STRUCTURAL MEMBER FOR HOT- ISOSTATIC MOLDING ABSTRACT OF THE DISCLOSURE There is disclosed a process for compacting a porous ceramic structural member having a complicated shape and an optional size by encapsulation with material of the same type and capable of sintering and subsequently subjected to hot-isostatic pressing; immersing the preformed body in a suspension of a material of the same type in a solvent but which contains no sintering aid and forming a first encapsulating layer; evaporating the solvent; immersing the thus obtained body in a second suspension of a material in a solvent of the same type capable of sintering and which contains one or more sintering aids, and forming a second encapsulating layer; evaporating the solvent; subjecting the thus obtained body at an elevated temperature in an atmosphere of a protective gas for a sufficient period of time to sinter the same; isostatically compacting the body provided with a tight-sintered surface; and mechanically removing the encapsulating layers.
473298
Bohmer Manfred
Heinrich Jurgen
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Deutsche Forschungs-Und Versuchsanstalt Fur Luft- Und Raumfahrt
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