Accession Number : AD0665860

Title :   GASKETING MEDIA AT ULTRA-HIGH PRESSURE.

Descriptive Note : Final rept. 1 May 66-30 Apr 67,

Corporate Author : NEW YORK UNIV N Y RESEARCH DIV

Personal Author(s) : Prince,Martin ; Okamoto,Yoshiyuki

Report Date : JUN 1967

Pagination or Media Count : 44

Abstract : The development of new materials to be used as solid pressure transmitting media in ultra-high pressure, high temperature apparatus equipped with x-ray facilities has been investigated. The ultra-high pressure apparatus used was the tetrahedral anvil press. Four composite materials were found to be superior to all others tested: (1) 70% amorphous boron, 30% polyphenylene oxide; (2) 80% amorphous boron, 15% polyphenylene oxide, 5% Nalcon; (3) 80% lithium hydride, 20% polyphenylene oxide; and (4) 90% lithium hydride, 10% polyphenylene oxide. The composites were tested for their stability at high temperatures at atmospheric pressure under inert conditions and at a pressure of 40 kilobars in a tetrahedral anvil press. High pressure calibration experiments were performed for each composite by utilizing resistance transitions in bismuth 1 to 11 and 11 to 111 at room temperature. The materials have also been rated as effective gasketing materials by comparison to the standard material pyrophyllite. Other high temperature polymers such as polyimides did not prove satisfactory. (Author)

Descriptors :   (*HIGH PRESSURE, GASKETS), (*GASKETS, *COMPOSITE MATERIALS), BORON, X RAY DIFFRACTION, THERMAL STABILITY, COMPRESSIVE PROPERTIES, EPOXY RESINS, LITHIUM COMPOUNDS, HYDRIDES, BINDERS, PHASE STUDIES

Subject Categories : Laminates and Composite Materials
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE