EP0471389A2
Expired / Lapsed
EP
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Aluminum oxide/aluminum oxynitride/group IVB metal nitride abrasive particles derived from a sol-gel process
Assignee: 3M Co
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Filing: 1987-11-18
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Granted: —
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Expires: 2007-11-18
Abstract
Abstract The present invention provides a nearly fully dense, microcrystalline, composite ceramic abrasive particle comprising grains of alumina, gamma-aluminum oxynitride and, optionally, a Periodic Group IVB metal nitride in the system Al₂O₃/ALON/Group IVB metal nitride. In another aspect, two different processes for making an abrasive particle such as an abrasive grit, comprising a multiphase mixture of microcrystalline components in this system using sol gel techniques and pressureless reaction-sintering, are disclosed.
Inventors
- 👤 James P. C/O Minnesota Mining And Mathers
- 👤 William P. C/O Minnesota Mining And Wood
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 00:24
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/02; B24D3/04; B24D3/14; C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/111; C04B35/117; C04B35/1115; C04B35/515; C04B35/58; C04B35/581; C04B35/622; C04B35/624; C09; C09K; C09K3/00; C09K3/14; C09K3/1409; C09K3/1418
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
55 words
A coated ceramic abrasive article comprising a backing and having coated on at least one surface thereof a composition comprising a bonding resin and at least one ceramic abrasive particle consisting essentially of a uniform multiphase composite consisting essentially of alumina and gamma-aluminum oxynitride and optionally at least one Periodic Table Group IVB metal nitride.
Claim 2
Dependent Claim
13 words
The article according to claim 1 wherein said composite is nearly fully dense.
Claim 3
Dependent Claim
57 words
The article according to claims 1 and 2 wherein said ceramic abrasive particle consists essentially of a uniform multiphase mixture of microcrystalline components, said components consisting essentially of 1 to 95 volume percent alumina, 1 to 95 volume percent gamma-aluminum oxynitride, and 0 to 50 volume percent of at least one Periodic Table Group IV metal nitride.
Claim 4
Dependent Claim
26 words
The article according to claims 1 to 3 wherein said composite of said ceramic abrasive particle is composed of up to 3 weight percent zirconium nitride.
Claim 5
Dependent Claim
23 words
The article according to claims 1 to 4 wherein in said ceramic abrasive particle said Periodic Group IVB metal nitride is titanium nitride.
Claim 6
Dependent Claim
21 words
The article according to claims 1 to 5 wherein said ceramic abrasive particle is a grit flake, rod, or other shape.
Claim 7
Dependent Claim
21 words
The article according to claims 1 to 6 wherein said ceramic abrasive particle has a grain size less than 10 micrometers.
Claim 8
Independent Claim
63 words
A method of making a coated abrasive article according to claims 1 to 7, said method comprising the steps of (a) providing a backing, (b) applying an abrasive layer onto a surface of said backing, said abrasive layer comprising a bonding resin and at least one of said ceramic abrasive particles, and (c) curing said bonding resin, to provide a coated abrasive article
Claim 9
Independent Claim
78 words
A method of grinding a surface comprising the step of: moving, in contact with each other, a grindable surface and a ceramic abrasive article for a time sufficient to alter the grindable surface, said ceramic abrasive article comprising a uniform multiphase mixture of microcrystalline components, said components consisting essentially of: 1 to 95 volume percent alumina, 1 to 95 volume percent gamma-aluminum oxynitride, and 0 to 50 volume percent of at least one Periodic Group IVB metal nitride.
References Cited (Backward Citations)
No citation records indexed.
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