Accession Number : ADA303732

Title :   Dynamic Consolidation of Combustion Synthesized Alumina-Titanium Diboride Ceramic Composites.

Descriptive Note : Final rept. 1 Oct 89-1 Oct 91,

Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Kecskes, Laszlo J. ; Niiler, Andrus ; Kottke, Thomas ; Logan, Kathryn V. ; Villalobos, Guillermo R.

PDF Url : ADA303732

Report Date : DEC 1995

Pagination or Media Count : 50

Abstract : A mixture of TiO2, B2O3, and Al powders was reacted exothermically to form a low-density Al2O3-TiB2 foamed product. After the cessation of the combustion synthesis reaction, this hot foam was densified by the pressure waves generated by the detonation of an explosive charge. The delay time between the initiation of the combustion synthesis and detonation of the explosive, the thickness of the explosive charge, and the strength of sample confinement were found to influence the effectiveness of the consolidation. Analysis of the combustion synthesis reaction temperature histories and microscopy of the reacted product sponge are used to develop additional information about this reaction/consolidation process. These results, and the microstructural properties of the combustion-synthesized and dynamically consolidated products, are discussed. jg p4

Descriptors :   *SYNTHESIS, *CERAMIC MATERIALS, *COMBUSTION, *ALUMINUM OXIDES, *TITANIUM BORIDE, MICROSTRUCTURE, POWDERS, HIGH TEMPERATURE, EXPLOSIVE CHARGES, MICROSCOPY, CHEMICAL REACTIONS, PRESSURE, DELAY, LOW DENSITY, CONFINEMENT(GENERAL), BORON, DETONATIONS, FOAM, TITANIUM OXIDES, MECHANICAL WAVES, SPONGES.

Subject Categories : Ceramics, Refractories and Glass
      Inorganic Chemistry
      Ammunition and Explosives
      Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE