Thermal Neutron Radiation Shielding and Thermal Properties of B^sub 4^C^sub P^/PI Polyimide Composite Films

B4CP/PI polyimide composite films with different powder contents and thicknesses were prepared by particle surface modification and wet mixing machinery-thermal imidization method, using high temperature polyimide as matrix and micro-sized boron carbide (B4C) as thermal neutron absorption material....

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Published inCai liao gong cheng = Journal of materials engineering Vol. 46; no. 3; p. 48
Main Authors Li, Xiao-min, Wu, Ju-ying, Tang, Chang-yu, Yuan, Ping, Xing, Tao, Zhang, Kai, Mei, Jun, Huang, Yu-hong
Format Journal Article
LanguageChinese
Published Beijing Beijing Institute of Aeronautical Materials 01.03.2018
Subjects
Boron carbide
Chemical industry
High temperature
Ions
Mechanical properties
Neutron absorption
Radiation shielding
Radiation tolerance
Structural design
Thermal neutrons
Thermal resistance
Thermal stability
Thermodynamic properties
Thickness
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Summary:B4CP/PI polyimide composite films with different powder contents and thicknesses were prepared by particle surface modification and wet mixing machinery-thermal imidization method, using high temperature polyimide as matrix and micro-sized boron carbide (B4C) as thermal neutron absorption material. The thermal neutron radiation shielding property, thermal stability and mechanical property of B4CP/PI polyimide composite films were mainly discussed in this paper. It is shown that the micro-sized B4C functional particles can be well dispersed in PMDA-ODA polyimide matrix, and the thermal stability of B4CP/PI polyimide composite films are significantly improved with the increase of B4C content. However, the mechanical properties of the composite films present the opposite trend; meanwhile, the B4CP/PI polyimide composite films exhibit excellent thermal neutron radiation shielding properties, and the neutron permeability I/I0 presents exponential relationship with the increasing thickness of composite and B4C fill
ISSN:1001-4381
DOI:10.11868/j.issn.1001-4381.2016.001076