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Title
Verfahren zur Herstellung eines Werkstoffes, Formkoerpern aus diesem Werkstoff und deren Verwendung
Date Issued
2000
Author(s)
Lenk, R.
Loeschau, W.
Scharek, S.
Teichgraeber, M.
Richter, C.
Nowotny, S.
Adler, J.
Patent No
1997-19730742
Abstract
Producing a silicon-containing non-oxide ceramic material comprises subjecting a green body or layer, formed from a homogeneous powder of a non-oxidic silicon compound or pure silicon, to heat treatment at at least 800 deg. C in an oxidising atmosphere and/or to heat input from a deflected laser beam. Also claimed is the production of an article by layer-wise selective laser sintering of the above material. USE - The material is used as a filter material, as an electrostatic filter or as a protective layer on metallic substrates (claimed). ADVANTAGE - The presence of an oxidising atmosphere causes in-situ formation of small amounts of a temporary binder phase of silicon and/or Si-O-N compounds to provide high strength with almost no undesired by-products. The material has low production cost, can be formed to a wide variety of shapes (including large or complicated shaped bodies), can be produced without the use of a sintering aid, exhibits almost no shrinkage during production and has a relatively high porosity allowing use as a filter material or subsequent metal (e.g. aluminium) or silicon infiltration.
Language
de
Patenprio
DE 1997-19730742 A: 19970717