EP0252046A2
Expired / Lapsed
EP
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Coated ceramic sintered whisker reinforced body
Assignee: Sandvik AB
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Filing: 1987-06-16
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Granted: —
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Expires: 2007-06-16
Abstract
Abstract The present disclosure relates to whisker reinforced ceramics preferably based upon pure oxide ceramics or mixed ceramics, which by means of coating with a thin wear resistant surface layer have obtained improved performance. It has been found that coating with a thin surface layer protects the whisker material against chemical attacks and provides a possibility to make better use of the inherent good properties of whisker reinforced ceramics.
Inventors
- 👤 Rolf Hakan Engström
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 05:47
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; B; B23; B23B; B23B27/00; B23B27/14; B23B27/148; C04B35/00; C04B35/01; C04B35/10; C04B35/111; C04B35/117; C04B35/48; C04B35/486; C04B35/488; C04B35/622; C04B35/626; C04B35/628; C04B35/62844; C04B35/62897; C04B35/71; C04B35/78; C04B35/80; C04B41/45; C04B41/4584; C04B41/50; C04B41/5025; C04B41/80; C04B41/81; C04B41/85; C04B41/87; B23B2228/00; B23B2228/61; C04B2235/00; C04B2235/02; C04B2235/50; C04B2235/52; C04B2235/5208; C04B2235/5216; C04B2235/522; C04B2235/5224; C04B2235/5236; C04B2235/524; C04B2235/5244; C04B2235/5276
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
27 words
Whisker reinforced ceramic sintered body characterized in, that it is coated with one or more dense, wear resistant surface layers with a total thickness of <20 µm.
Claim 2
Dependent Claim
27 words
Whisker reinforced ceramic sintered body characterized in, that it is coated with one or more dense, wear resistant surface layers with a total thickness of <20 µm.
Claim 3
Dependent Claim
43 words
Sintered body according to the preceding claim, characterized in, that the ceramic matrix essentially comprises ceramic oxides or of ceramic oxides mixed with one or more hard carbides and/or nitrides and/or borides and/or binder metal, preferably of Al₂O₃, ZrO₂ or partly stabilized ZrO₂.
Claim 4
Dependent Claim
28 words
Sintered body according to any of the preceding claims, characterized in, that the whisker material is TiN, TiC, B₄C, Al₂O₃, ZrO₂, preferably SiC or Si₃N₄ or mixtures thereof.
Claim 5
Dependent Claim
26 words
Sintered body according to any of the preceding claims, characterized in, that the outermost coating is a 0.05-20 µm, preferably 1-10 µm thick layer of Al₂O₃.
Claim 6
Dependent Claim
35 words
Sintered body according to any of the preceding claims, characterized in, that the whiskers by means of pretreatment have obtained a thin, at the most 0.1 µm thick surface coating of a different inert material.
References Cited (Backward Citations)
No citation records indexed.
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