Title: Cutting tools and wear resistant articles and material for same

Abstract

A ceramic having a relatively high proportion of an alpha prime SiAlON phase and exhibiting high hardness and toughness. In a particularly preferred embodiment, a cation of Gd is used as a modifying cation.

Inventors:

Tien, Tseng-Ying ^[1]; Huang, Zhen-Kun ^[1]

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+ Show Inventor Affiliations

1. Ann Arbor, MI

Issue Date:

Sat Jan 01 00:00:00 EST 2000

Research Org.:

Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

OSTI Identifier:

873264

Patent Number(s):

6124225

Application Number:

09/124658

Assignee:

Regents of University of Michigan (Ann Arbor, MI)

Patent Classifications (CPCs):

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

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C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

C04B2235/3217 - Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
C04B2235/3224 - Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
C04B2235/3225 - Yttrium oxide or oxide-forming salts thereof
C04B2235/36 - Glass starting materials for making ceramics, e.g. silica glass
C04B2235/3865 - Aluminium nitrides
C04B2235/3869 - Aluminium oxynitrides, e.g. AlON, sialon
C04B2235/3878 - Alpha silicon nitrides
C04B2235/3882 - Beta silicon nitrides
C04B2235/5445 - submicron sized, i.e. from 0,1 to 1 micron
C04B2235/608 - Green bodies or pre-forms with well-defined density
C04B2235/6587 - Influencing the atmosphere by vaporising a solid material, e.g. by using a burying of sacrificial powder
C04B2235/766 - Trigonal symmetry, e.g. alpha-Si3N4 or alpha-Sialon
C04B2235/767 - Hexagonal symmetry, e.g. beta-Si3N4, beta-Sialon, alpha-SiC or hexa-ferrites
C04B2235/77 - Density
C04B2235/785 - Submicron sized grains, i.e. from 0,1 to 1 micron
C04B2235/786 - Micrometer sized grains, i.e. from 1 to 100 micron
C04B2235/788 - Aspect ratio of the grains
C04B2235/79 - Non-stoichiometric products, e.g. perovskites
C04B2235/80 - Phases present in the sintered or melt-cast ceramic products other than the main phase
C04B2235/96 - Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
C04B35/597 - based on silicon oxynitride, {e.g. SIALONS}
C04B35/6261 - {Milling}
C04B35/64 - Burning or sintering processes
C04B35/645 - Pressure sintering
C04B35/6455 - {Hot isostatic pressing}

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DOE Contract Number:  

AC05-84OR21400

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

cutting; tools; wear; resistant; articles; material; ceramic; relatively; proportion; alpha; prime; sialon; phase; exhibiting; hardness; toughness; particularly; preferred; embodiment; cation; gd; modifying; particularly preferred; cutting tools; preferred embodiment; cutting tool; wear resistant; resistant articles; /501/264/