Accession Number:

AD0878331

Title:

Research to Determine the Effects of Surface Catalycity on Materials Behavior in Dissociated Gas Streams-ATJ-Graphite

Descriptive Note:

[Technical Report, Final Report]

Corporate Author:

LITTLE (ARTHUR D) INC CAMBRIDGE MA

Personal Author(s):

Report Date:

1970-02-28

Pagination or Media Count:

62

Abstract:

The reactions of partially dissociated oxygen with heated ATJ graphite surfaces have been investigated at temperatures of 1600-2800K and oxygen atom partial pressures of 0.007 to 0.074 torr. Measurements of total oxygen atom decay as a result of both chemical reaction and catalytic recombination were carried out by the NO-NO2 light intensity method in a fast flow system. Weight change measurements were made to separate the total atom loss results into its two components. Mass spectrometric experiments were carried out over the temperature range 400-1200K to determine product distribution as a function of oxygen molecule dissociation. The rate of net atom loss was found to be linear with time at a given partial pressure, and approximately first order in pressure. The net atom loss rate shows a maximum in the temperature interval investigated, the maximum shifting to higher temperatures with decreasing oxygen atom pressure.

Descriptors:

Subject Categories:

  • Ceramics, Refractories and Glass
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

[A, Approved For Public Release]