Interface reaction and characterization in B/Al compositesInterfacial reactions, strength degradation, and fracture morphology have been characterized in B/Al(1100) and B/Al(6061) composite systems at a volume fraction of 0.55. Reaction was promoted by isothermal exposure at 350 C or 500 C for times up to 860,000 s. Tetragonal AlB12 was identified as the reaction product in the 6061 matrix and hexagonal AlB2 in the 1100 matrix. Interface development is analyzed based on a moving boundary model modified by the addition of ternary elements. While strength decreases in both systems, the time dependence of elevated-temperature exposure is different in the two matrix materials. In the 45 deg fiber orientation, failure occurs primarily by matrix shear, whereas in the 90 deg fiber orientation, fracture morphology is characterized by a mixture of fiber splitting, ductile matrix fracture, and failure at fiber-matrix interfaces.
Document ID
19790032998
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Kim, W. H. (Drexel Univ. Philadelphia, PA, United States)
Koczak, M. J. (Drexel Univ. Philadelphia, PA, United States)
Lawley, A. (Drexel University Philadelphia, Pa., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1978
Subject Category
Composite Materials
Meeting Information
Meeting: ICCM/2; Second International Conference on Composite Materials