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Whisker-reinforced ceramic containing aluminum oxynitride and method of making the same

A technology of aluminum oxynitride and aluminum nitride, which is applied in the field of whisker-reinforced ceramics and its manufacture, and can solve problems such as difficulty in controlling the final composition of ceramics

Inactive Publication Date: 2007-04-25
KENNAMETAL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In the experimental work done by the present inventors at Kennametal Inc.'s own facility, it was also found that when aluminum nitride and aluminum oxide were used to form aluminum oxynitride, it was difficult to control the final composition of the ceramic

Method used

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  • Whisker-reinforced ceramic containing aluminum oxynitride and method of making the same
  • Whisker-reinforced ceramic containing aluminum oxynitride and method of making the same
  • Whisker-reinforced ceramic containing aluminum oxynitride and method of making the same

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Experimental program
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Embodiment Construction

[0036] Referring to the drawings, FIG. 1 shows a cutting tool of the type RNG43T0320 generally referred to as 20 . Cutting tool 20 has a rake face 22 and a flank face 24 . The rake face 22 and side face 24 intersect at their junction to form a cutting edge 26 , wherein the cutting edge has a generally circular shape. While the cutting tool 20 is shown as a generally cylindrical cutting tool, it should be understood that the compositions of the present invention may be fabricated into cutting tools of other geometries. Also, while the particular embodiment shown is a cutting tool, it should be understood that the ceramic compositions of the present invention may be used in other products such as wear-resistant products and impact-resistant parts, as well as other structural applications.

[0037] The cutting tool 20 is not coated. The substrate of the ceramic cutting tool 20 comprises aluminum oxynitride and titanium carbonitride and silicon carbide whiskers.

[0038] As an ...

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Abstract

A ceramic body (20), as well as a method for making the same, wherein the ceramic body contains aluminum oxynitride and whiskers, (and optionally) one or more of titanium carbonitride, and / or alumina, and / or zirconia, and / or other component(s).

Description

[0001] (related application) [0002] This application is a continuation-in-part of co-pending application Serial No. 10 / 831383, filed April 23,2004. technical field [0003] The present invention relates to whisker-reinforced ceramics and methods of making the same. More specifically, the present invention relates to whisker-reinforced ceramics comprising aluminum oxynitride and optionally other materials and methods of making the same. Background technique [0004] Whisker reinforced materials such as whisker reinforced ceramics have been known for some time. In this regard, US Patent No. 4,543,345 to Wei describes silicon carbide whisker reinforced alumina ceramic materials. US Patent Nos. 4,789,277 to Rhodes et al. and 4,961,757 to Rhodes et al. each disclose a ceramic cutting tool in which the ceramic is silicon carbide whisker reinforced alumina. [0005] US Patent No. 6,447,896 to Augustine discloses a coated ceramic cutting tool in which the ceramic contains silic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/81C04B35/38C04B35/58
CPCC04B2235/5276C04B2235/5244C04B35/806C04B2235/5264C04B2235/3869C04B2235/526C04B2235/3821C04B35/803C04B2235/3229C04B2235/3208C04B2235/3813C04B2235/5296C04B2235/3222C04B2235/77C04B2235/3227C04B2235/3856C04B35/645C04B2235/3895C04B35/117C04B2235/3224C04B2235/3225C04B2235/3886C04B35/581C04B2235/3244C04B35/80
Inventor R·L·耶克利S·吴
Owner KENNAMETAL INC