Subsurface Characterization of Metal Matrix Composite by Ultrasound
碩士 === 國立交通大學 === 機械工程研究所 === 84 === The subsurface properties of metal matrix composites are investigated by measurement of surface acoustic waves in this thesis. A correlation of the wear resis- tibility and weight fraction of particle-r...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
1996
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| Online Access: | http://ndltd.ncl.edu.tw/handle/99038338899288014548 |
| Summary: | 碩士 === 國立交通大學 === 機械工程研究所 === 84 === The subsurface properties of metal matrix composites are
investigated by measurement of surface acoustic waves in this
thesis. A correlation of the wear resis- tibility and weight
fraction of particle-reinforced Zircon/ZAS and SiC/Al with the
wavespeeds and attenua- tion factors of low-frequency surface
acoustic waves is established. A contact-type fixture,
followed Rose' literature, has been developed to transmit and
receive surface acoustic waves on the specimens. The accuracy
and validity of this fixture have been verified in vari- ous
isotropic metal blocks. The measurement errors are below
0.7%. Experimental results of those metal matrix composite
specimens show that surface wave velocity in- creases with the
weight fraction and is proportional to the logarithm of wear
resistibility. The frequency- dependence of attenuation
factors with respect to vari- ous weight fractions is also
established quantitatively.
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