Ductile intermetallic toughened carbide matrix composites

PDF Version Also Available for Download.

Description

Ductile Ni{sub 3}Al alloys have been used as binder phase for fabrication of TiC and WC matrix composites. Ni{sub 3}Al has good corrosion resistance to aqueous acidic environments, and its yield strength increases with temperature to a max at 700-800 C; this combined with high tensile ductilities (up to 50% strain) make Ni{sub 3}Al attractive for replacing Co in cemented carbides. Materials have been fabricated by both hot pressing and vacuum sintering, with Ni{sub 3}Al contents of 15 to 95 vol%. Vacuum sintering cycles, similar to those used for WC/Co and TiC/Ni (1450-1600 C), resulted in sintered densities >95% theoretical. ... continued below

Physical Description

9 p.

Creation Information

Plucknett, K.P.; Tiegs, T.N.; Becher, P.F.; Waters, S.B. & Menchhofer, P.A. August 1, 1996.

Context

This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 11 times . More information about this article can be viewed below.

Who

People and organizations associated with either the creation of this article or its content.

Sponsor

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this article. Follow the links below to find similar items on the Digital Library.

Description

Ductile Ni{sub 3}Al alloys have been used as binder phase for fabrication of TiC and WC matrix composites. Ni{sub 3}Al has good corrosion resistance to aqueous acidic environments, and its yield strength increases with temperature to a max at 700-800 C; this combined with high tensile ductilities (up to 50% strain) make Ni{sub 3}Al attractive for replacing Co in cemented carbides. Materials have been fabricated by both hot pressing and vacuum sintering, with Ni{sub 3}Al contents of 15 to 95 vol%. Vacuum sintering cycles, similar to those used for WC/Co and TiC/Ni (1450-1600 C), resulted in sintered densities >95% theoretical. WC/Ni{sub 3}Al materials showed an order of magnitude improvement in corrosion resistance over WC/Co, in sulfuric/nitric acid. These materials also had improved high temperature strength retention compared to WC/Co cermets, though initial RT strengths were lower. Fracture toughness varied between 8 and 25 MPa.m{sup 1/2} and depended primarily on Ni{sub 3}Al content and composition.

Physical Description

9 p.

Notes

OSTI as DE96013772

Source

  • 20. annual conference on composites, advanced ceramics, materials and structures-B, Cocoa Beach, FL (United States), 7-11 Jan 1996

Language

Item Type

Identifier

Unique identifying numbers for this article in the Digital Library or other systems.

  • Other: DE96013772
  • Report No.: CONF-960106--15
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 372670
  • Archival Resource Key: ark:/67531/metadc683983

Collections

This article is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

What responsibilities do I have when using this article?

When

Dates and time periods associated with this article.

Creation Date

  • August 1, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

Description Last Updated

  • Jan. 21, 2016, 8:03 p.m.

Usage Statistics

When was this article last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 11

Interact With This Article

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

Citations, Rights, Re-Use

Plucknett, K.P.; Tiegs, T.N.; Becher, P.F.; Waters, S.B. & Menchhofer, P.A. Ductile intermetallic toughened carbide matrix composites, article, August 1, 1996; Tennessee. (digital.library.unt.edu/ark:/67531/metadc683983/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.