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Photoacoustic measurements have been made at the 4.803 μm absorption line of carbon monoxide in a small nonresonant cell using a low power semiconductor laser source. A simple theoretical model correctly predicts the dependence of the CO signal on chopping frequency and concentration dependence but is inadequate in describing the pressure dependence. Concentrations as low as 50 ppmv were measured by operating the cell in a double pass mode.

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The kinetic spray method has been used to fabricate aluminum metal matrix composites for thermal management applications. This approach offers a simple means of coating planar surfaces with various types of metal/metal and metal/ceramic composites, the thermal properties of which can be tailored by appropriate control of material and mixing parameters.