Accession Number:

ADA012439

Title:

An Investigation of Reaction Sintered Silicon Nitride as a Radome Material.

Descriptive Note:

Final rept. 1 Dec 73-28 Feb 75,

Corporate Author:

GEORGIA INST OF TECH ATLANTA ENGINEERING EXPERIMENT STATION

Personal Author(s):

Report Date:

1975-03-01

Pagination or Media Count:

54.0

Abstract:

Studies to form reaction bonded silicon nitride radomes from slip-cast silicon are described. The costs associated with fabricating slip-cast reaction sintered silicon nitride radomes in the laboratory are compared with the costs for slip-cast fused silica radomes. The techniques and materials used to develop slips from silicon powder, the pressure casting techniques and the reaction sintering techniques used to obtain electrically acceptable radomes are described. Transmission and pattern degradation measurements were made on the smaller radomes. One radome with an estimated density of 2.45 gmcc had a transmission loss of less than 1 dB. Slip-cast reaction sintered silicon nitride radomes can be formed with final nitrided densities of 2.0 to 2.6 gmcc, however, the difficulty of obtaining fully nitrided radomes with electrically acceptable properties increases with increasing density.

Subject Categories:

  • Ceramics, Refractories and Glass
  • Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE