STP1278

    Absorption of Organic Compounds and Organometallics on Ceramic Substrates for Wear Reduction

    Published: Jan 1996


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    Abstract

    The concept of employing thermally stable compounds (that is, metal oxides) as high temperature vapor phase ceramic lubricants was investigated. A major part of this study was devoted to the development of various calorimetric and tribological techniques that could be used to determine interfacial reactions between thermally stable compounds and ceramic substrates such as zirconia and alumina. This interaction is pivotal in understanding the mechanism of high temperature lubricity. The approach consisted of selecting low sublimation temperature materials and measuring their thermodynamic interactions as vapors with the ceramic substrates. The materials studied included two easily sublimable organic compounds (that is, naphthalene and salicylic acid) and several organometallics (for example, copper phthalocyanine). Thermodynamic data such as heat of adsorption, packing density, and reversibility of the adsorption were obtained on some of these compounds and were related to wear characteristics. All of these compounds provided effective lubrication at room temperature. Copper phthalocyanine was an effective lubricant at temperatures up to 400°C.

    Keywords:

    surface coatings, surface treatments, wear testing, high temperatures, lubricants, ceramics, organometallics, vapor phase lubrication, sublimation, bearing lubrication, adsorption, heat of adsorption, alumina


    Author Information:

    Kennedy, PJ
    Research chemist and staff scientist, Naval Air Warfare Center, Patuxent River, MD

    Agarwala, VS
    Research chemist and staff scientist, Naval Air Warfare Center, Patuxent River, MD


    Paper ID: STP16104S

    Committee/Subcommittee: G02.30

    DOI: 10.1520/STP16104S


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