Accession Number : ADA315455

Title :   Nanocrystalline Processing and Interface Engineering of Si3N4-Based Nanocomposites.

Descriptive Note : Technical rept. 1 Jul-30 Sep 96,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMICAL ENGINEERING

Personal Author(s) : Ying, Jackie Y.

PDF Url : ADA315455

Report Date : 01 OCT 1996

Pagination or Media Count : 3

Abstract : Due to its hardness and wear resistance, TiN is potentially very useful in demanding engineering applications. However, due to low sintering activities in microcrystalline powders, TiN has been primarily used as a coating, rather than a monolithic ceramic material. This report outlines processing techniques by which bulk, dense, nanostructured TiN materials may be produced. A valved filter collection device added to a novel forced flow reactor used for synthesizing nanocrystalline TiN powders allows for the collection of these powders without exposing them to air. Subsequent careful powder handling procedures allow the production of dense (99%), nanostructured (grain size 250 nm) TiN through a pressureless sintering process at 1400 deg C. p3

Descriptors :   *COMPOSITE MATERIALS, *CRYSTALLIZATION, *NITRIDES, *TITANIUM, *SILICON NITRIDES, MICROSTRUCTURE, INTERFACES, MATERIALS, POWDERS, PROCESSING, BULK MATERIALS, CERAMIC MATERIALS, COATINGS, PRESSURE, FILTERS, VALVES, HARDNESS, WEAR RESISTANCE, CHEMICAL ENGINEERING, SINTERING.

Subject Categories : Laminates and Composite Materials
      Inorganic Chemistry
      Ceramics, Refractories and Glass
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE