EP0113249A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Metallic materials reinforced by a continuous network of a ceramic phase
Assignee: Rio Tinto Alcan International Ltd
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Filing: 1983-12-29
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Granted: —
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Expires: 2003-12-29
Abstract
Abstract 57 A cermet material comprises an intergrown network of a minor proportion of ceramic such as TiB<sub>2</sub> in a metal matrix such as Al. The cermet is prepared by forming a minor proportion by weight of a ceramic phase in situ in a molten metal phase and holding the mixture of elevated temperature for a time to effect formation of an intergrown ceramic network.
Inventors
- 👤 Martin Rebekoff Reeve
- 👤 Adam Jan Gesing
- 👤 Graham Stratford
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 08:40
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/0047; C22C32/0073; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12049; Y10T428/12056; Y10T428/1216; Y10T428/12167
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
41 words
A cermet material comprising a minor proportion by weight of a ceramic in a major proportion by weight of a metal matrix, characterized in that the material has a microstructure of an intergrown network of the ceramic in the metal matrix.
Claim 2
Dependent Claim
41 words
A cermet material comprising a minor proportion by weight of a ceramic in a major proportion by weight of a metal matrix, characterized in that the material has a microstructure of an intergrown network of the ceramic in the metal matrix.
Claim 3
Dependent Claim
19 words
A cermet material as claimed in claim 1, wherein the ceramic content is from 10% to 45% by weight.
Claim 4
Dependent Claim
32 words
A cermet material as claimed in claim 1 or claim 2, wherein the metal matrix is one or more of Al, Ti, Cr, V, Nb, Zr, and Hf or an alloy thereof.
Claim 5
Dependent Claim
56 words
A cermet material as claimed in any one of claims 1 to 3, wherein the metal is aluminium or an aluminium alloy and most or all of the ceramic is a diboride of Ti, Zr, Hf, Nb, V or Cr, the ceramic forming an open- cell continuous network the interstices of which are filled with metal.
Claim 6
Dependent Claim
17 words
A cermet material as claimed in claim 4, wherein from 20% to 30% of diboride is present.
Claim 7
Dependent Claim
24 words
A cermet material as claimed in claim 4, or claim 5, wherein up to 20% by weight of a non-boride ceramic is also present.
Claim 8
Dependent Claim
25 words
A cermet material as claimed in any one of claims 1 to 6, prepared by forming the ceramic in situ in a molten metal phase.
Claim 9
Independent Claim
58 words
A method of making a cermet material, which method comprises forming a minor porportion by weight of dispersed particles of a ceramic phase in situ in a major proportion of a molten metal phase, and holding the molten metal phase containing the dispersed particles at elevated temperature for a time to effect formation of an intergrown ceramic network.
Claim 10
Independent Claim
58 words
A method of making a cermet material, which method comprises forming a minor porportion by weight of dispersed particles of a ceramic phase in situ in a major proportion of a molten metal phase, and holding the molten metal phase containing the dispersed particles at elevated temperature for a time to effect formation of an intergrown ceramic network.
Claim 11
Dependent Claim
37 words
A method as claimed in claim 8, in which the ceramic phase is formed by reacting a carbon- , boron- and/or nitrogen-bearing ceramic precursor, or carbon, boron and/or nitrogen in elemental form, with the molten metal phase.
Claim 12
Dependent Claim
27 words
A method as claimed in claim 8, in which the ceramic phase is formed by reacting in situ in the molten metal phase two non-metallic ceramic precursors.
Claim 13
Independent Claim
39 words
A method as claimed in any one of claims 8 to 10, wherein the metal is aluminium or an aluminium alloy and most or all of the ceramic is a diboride of Ti, Zr, Hf, Nb, V or Cr.
Claim 14
Dependent Claim
30 words
A method as claimed in claim 11,- wherein the ceramic is or comprises TiB 2 produced by adding K 2 TiF 6 with KBF 4 to the molten metal phase.
Claim 15
Independent Claim
42 words
A method as claimed in any one of claims 8 to 12, wherein the proportion of ceramic in the metal matrix is increased by squeeze casting the molten metal containing the ceramic phase under conditions to effect removal of unwanted molten metal.
References Cited (Backward Citations)
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