Nanoscale mechanical properties of polymer composites: Changes in elastic modulus and measurement of ion penetration depth due to {alpha}-radiation
- Chemistry and Materials Science Directorate, Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)
The local mechanical properties of silica-reinforced silicone composites were investigated using a modified atomic force microscopy technique. Elastic modulus measurements (1.5{+-}0.1 MPa) are consistent with bulk measurements (1.9 MPa), and changes in the modulus at the surface of the composite samples (E=1.5 to 3.5 MPa) were observed as a result of {alpha}-irradiation (dose=1.7x10{sup 10} to 2.0x10{sup 12} {alpha}/cm{sup 2}). The sensitivity of the technique was demonstrated by a detectable change in modulus at even the small dose of 1.7x10{sup 10} {alpha}/cm{sup 2}. The penetration depth of the {alpha}-particles into the material, estimated to be 22{+-}2 {mu}m from the sample edge, was determined by cross-section depth profiling; and modeling of the ion penetration depth using transport of ions in matter codes (24.4{+-}0.4 {mu}m) closely matched experimental observations. (c) 2000 Materials Research Society.
- OSTI ID:
- 20216858
- Journal Information:
- Journal of Materials Research, Vol. 15, Issue 4; Other Information: PBD: Apr 2000; ISSN 0884-2914
- Country of Publication:
- United States
- Language:
- English
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