Measurements of residual strains in ceramic–elastomer composites with diffuse scattering of polarized neutrons

✍ Scribed by Wojciech Zając; Anna Boczkowska; Kamil Babski; Krzysztof J. Kurzydłowski; Pascale P. Deen

• Book ID: 103998606
• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 329 KB
• Volume: 56
• Category: Article
• ISSN: 1359-6454
• DOI: 10.1016/j.actamat.2008.08.004

✦ Synopsis

An experiment of diffuse scattering (also referred to as wide-angle neutron scattering) of polarized neutrons with polarization analysis was performed in order to detect residual strains in ceramic-elastomer composites of porous SiO 2 and poly(urea-urethane) elastomers. Two ceramics, with pore sizes of 20 and 70 lm, and two elastomers, with hard/soft segments molar ratios of H/S = 0.25 and 1.5, were selected for composite fabrication. The use of polarization analysis made it possible to detect and study very weak coherent scattering peaks from the elastomer synthesized inside SiO 2 ceramics. Residual strains were detected and measured based on interatomic distances in the SiO 2 + H/S = 1.5 composite but not in the SiO 2 + H/S = 0.25. The reason is sought in soft domains being ordered in the H/ S = 0.25 elastomer as opposed to the H/S = 1.5 one.