Increasing the thermal conductivity of boron nitride and aluminum nitride particle epoxy-matrix composites by particle surface treatments

Authors
Citation
Ys. Xu et Ddl. Chung, Increasing the thermal conductivity of boron nitride and aluminum nitride particle epoxy-matrix composites by particle surface treatments, COMPOS INTE, 7(4), 2000, pp. 243-256
Citations number
11
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
COMPOSITE INTERFACES
ISSN journal
0927-6440 → ACNP
Volume
7
Issue
4
Year of publication
2000
Pages
243 - 256
Database
ISI
SICI code
0927-6440(2000)7:4<243:ITTCOB>2.0.ZU;2-L
Abstract
The thermal conductivity of boron nitride and aluminum nitride particle epo xy-matrix composites was increased by up to 97% by surface treatment of the particles prior to composite fabrication. The increase in thermal conducti vity is due to decrease in the filler-matrix thermal contact resistance thr ough the improvement of the interface between matric and particles. Effecti ve treatments for BN involved acetone, acids (nitric and sulfuric) and sila ne. The most effective treatment involved silane such that the coating resu lted from the treatment amounted to 2.4% of the weight of the treated BN. T he effectiveness of a treatment was higher for a larger BN volume fraction. At 57 vol.% BN, the thermal conductivity reached 10.3 W/m.K. The treatment s had little effect on the specific surface area cf the BN particles. Silan e treatments were also effective for AlN. At 60 vol.% AlN, the thermal cond uctivity reached 11.0 W/m.K.