Viscoelastic Effect of Heat Treatment on the Fracture Toughness of Metal-Particulate/Glass-Matrix Composites |
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| Authors: | Todd L. Jessen John J. Mecholsky Jr |
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| Affiliation: | U.S. Naval Research Laboratory, Washington, D.C. 20375;Applied Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802 |
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| Abstract: | The fracture toughness ( K Ic) of a 90/10 glass-matrix/metal-particulate composite was measured as a function of treatment temperature and hold time. The toughness was 20% higher at a heat-treatment temperature 15°C below T g than at the other four treatment temperatures examined. K Ic also varied as a function of time at temperature. The volume fraction of exposed particulate phase on the fracture surface was proportional to the increase in the fracture toughness. |
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| Keywords: | composites fracture toughness glass metals heat treatment |
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