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US 7,802,478 B2Granted
Methods and apparatus for measuring elastic modulus of non-solid ceramic materials by resonance
AssigneeCorning Incorporated
InventorsRobert J. Dill, David V. Hayes, John D. Helfinstine, Timothy A. Roe, William P. Vann, David C. Ward
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Abstract
The present invention pertains to apparatus and methods for measuring elastic modulus (Young's modulus) of non-solid materials, including honeycomb ceramic materials used in the filtration and/or treatment of exhaust gasses, through a range of temperatures.
Claims18
A method of measuring the elastic modulus of a non-solid ceramic material comprising:
- suspending a non-solid ceramic material from two silica threads;
- delivering a vibration signal to the non-solid ceramic material through one silica thread as the non-solid ceramic material is heated across a range of frequencies and across a range of temperatures between 20° C. and 1200° C.;
- and,
- measuring a vibration signal from the non-solid ceramic material through another silica thread across the range of frequencies and the range of temperatures.
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A method of characterizing elastic modulus in a non-solid ceramic material comprising:
- suspending a non-solid ceramic material from two silica threads;
- heating the non-solid ceramic material across a range of temperatures between 20° C. and 1200° C.;
- cooling the non-solid ceramic material across a range of temperatures between 1200° C. and 20° C.;
- delivering a plurality of vibration signals comprising a range of frequencies to the non-solid ceramic material through one silica thread while heating and cooling the non-solid ceramic material;
- measuring a plurality of vibration signals from the non-solid ceramic material through a second silica thread across the range temperatures;
- identifying a plurality of peak vibration signals;
- calculating elastic modulus of the non-solid ceramic material as a function of the peak vibration signals measured through the heating and cooling of the non-solid ceramic material;
- and,
- displaying the calculated elastic modulus as a function of temperature through the heating and cooling of the non-solid ceramic material.
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Dependencies are inferred from the claim text.