単繊維 B/Al 複合体の引張強度に及ぼすα-AlB_<12> 相の影響(<特集>複合材料)

概要

論文の詳細を見る
Laminated B/Al films and mono-filament B/Al composites were prepared by ion plating aluminium onto boron films and boron fibers respectively. The formation of the α-AlB_<12> phase at the boron-aluminium interface and its influence on the tensile strength of the mono-filament B/Al composite were investigated quantitatively. It was found that the α-AlB_<12> phases were formed continuously on the boron films and the boron fibers and also partially in aluminium matrice in the determining process of boron-diffusion rate into α-AlB_<12>. The activation energy of the formation of the α-AlB_<12> phase was 130 kJ/mol. Thermal exposure decreased the tensile strength of the mono-filament B/Al composites due to the formation of the α-AlB_<12> phases at the interface. Relation between the tensile strength of the mono-filament B/Al composite and the thicknness of the α-AlB_<12> phase was represented by a Griffith's equation. The α-AlB_<12> phase is brittle and fractures under small strains, forming notches. The formed notch hastens fracture of the boron fiber, resulting in loss of the tensile strength of the mono-filament B/Al composite. The dependence of the tensile strength of the mono-filament B/Al composite on heat treatment conditions can be expressed by the following equation. σ_c=8.3×10^7{exp(-16000/T)×t}^<-1/4>(Pa) where σ_c is the tensile strength of the mono-filament B/Al composite and T and t are heat treatment temperature and time respectively.
社団法人日本鉄鋼協会の論文
1989-09-01

単繊維 B/Al 複合体の引張強度に及ぼすα-AlB_<12> 相の影響(<特集>複合材料)

スポンサーリンク

概要

著者

関連論文

スポンサーリンク