Accession Number : ADA194123

Title :   Ballistic Compressor Examination of Electrodeposited Niobium.

Descriptive Note : Final rept.,

Corporate Author : ARMY LAB COMMAND WATERTOWN MA MATERIAL TECHNOLOGY LAB

Personal Author(s) : Jennings, Laurence D ; Marotta, Alfred S ; Pan, S K

PDF Url : ADA194123

Report Date : Mar 1988

Pagination or Media Count : 16

Abstract : As part of a program to simultaneously examine the capabilities of the MTL ballistic compressor and to characterize materials, a series of high pressure, high temperature shots were made on specimens of niobium electrodeposited on a copper substrate. Each shot allowed the test gas to flow through an experimental channel. The resulting surfaces were examined optically and by scanning electron microscopy, and mass loss was measured. On the basis of these, it was noted that the niobium offered a measure of protection to the underlying material, and underwent a different damage mechanism than does steel. This mechanism is elucidated.

Descriptors :   *COMPRESSORS, *METAL COATINGS, BALLISTICS, CHANNELS, COPPER, DAMAGE, ELECTRODEPOSITION, ELECTRON MICROSCOPY, ELECTRONIC SCANNERS, GAS FLOW, HIGH PRESSURE, HIGH TEMPERATURE, LOSSES, MASS, NIOBIUM, PROTECTION, SUBSTRATES, HOT GASES, EROSION, ORDNANCE STEEL, REFRACTORY COATINGS, PLATING

Subject Categories : Coatings, Colorants and Finishes
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE