Abstract
To characterize the mechanical properties of materials at low temperatures, a novel variable low-temperature scanning acoustic microscopy (VLTSAM) has been developed. The temperature of the sample can be continuously varied between 30°C and -94°C in a methanol coupler. As a demonstration of the VLTSAM, frozen onion cells were imaged at quenched and slowly cooled states. Defects in a 0.6-mm-thick epoxy layer were also observed at -30°C with much more sensitivity than at ambient temperatures. As a tool to analyze subsurface images in VLTSAM, the V(z) curve theory for SAM was extended to describe time-resolved subsurface echoes.
| Original language | English |
|---|---|
| Pages (from-to) | 913-920 |
| Number of pages | 8 |
| Journal | Ultrasonics Symposium Proceedings |
| Volume | 2 |
| Publication status | Published - 1990 Dec 1 |
| Event | Proceedings of the IEEE 1990 Ultrasonics Symposium - Honolulu, HI, USA Duration: 1990 Dec 4 → 1990 Dec 7 |
ASJC Scopus subject areas
- Engineering(all)