Publications by Year: 1987

1987
Shih, W. Y. ; Aksay, I. A. ; Kikuchi, R. PHASE-DIAGRAMS OF CHARGED COLLOIDAL PARTICLES. Journal of Chemical PhysicsJournal of Chemical Physics 1987, 86, 5127-5132.
Shih, W. Y. ; Aksay, I. A. ; Kikuchi, R. REVERSIBLE-GROWTH MODEL - CLUSTER-CLUSTER AGGREGATION WITH FINITE BINDING-ENERGIES. Physical Review APhysical Review A 1987, 36, 5015-5019.
Sonuparlak, B. ; Sarikaya, M. ; Aksay, I. A. SPINEL PHASE FORMATION DURING THE 980-DEGREES-C EXOTHERMIC REACTION IN THE KAOLINITE-TO-MULLITE REACTION-SERIES. Journal of the American Ceramic SocietyJournal of the American Ceramic Society 1987, 70, 837-842.
Weber, W. J. ; Pederson, L. R. ; Prince, J. M. ; Davis, K. C. ; Exarhos, G. J. ; Maupin, G. D. ; Prater, J. T. ; Frydrych, W. S. ; Aksay, I. A. ; Thiel, B. L. ; et al. SYNTHESIS AND CHARACTERIZATION OF YBA2CU3O7-X SUPERCONDUCTORS. Advanced Ceramic MaterialsAdvanced Ceramic Materials 1987, 2 471-479.
Pyzik, A. J. ; Aksay, I. A. A multipurpose boron carbide-aluminum composite and its manufacture via the control of the microstructure, 1987.Abstract
The low-d. composite consists of B carbide porous compact and infiltrated Al, or Al alloy (e.g., Al-Cu, Al-Mg, Al-Si, Al-Mn-Mg, and/or Al-Cu-Mg-Cr-Zn). To reduce the reaction rate between B carbide and Al during infiltration, the B carbide is heated to 1800-2250° in the presence of free C (e.g., graphite). Prepn. of the composite comprising (1) dispersing a B carbide having particle size <10 μ in water or an inorg. medium; (2) consolidating B carbide into a porous compact by slip casting, pressure casting, injection molding, or isostatic pressing; (3) infiltrating the compact with Al by submerging in molten Al bath at 1150-1250°; (4) heat treatment at <1800°. Optionally, the porous compact is sintered at ∼1800-2250° prior to Al infiltration. The composite has high fracture toughness, strength, hardness, and stiffness. Thus, B carbide powder was dispersed in water at pH = 8, and the suspension was consolidated by slip casting. The porous compact was removed from the mold, dried 12 h at 45°, and 24 h at 110°, and heat treated 30 min at 2150°. The resulting compact was infiltrated with molten Al in a graphite furnace under vacuum at 1190° for 30 min. Final microstructure of the composite included B carbide 64, and Al 31%. The composite had fracture toughness of 9.7 MPa m1/2, fracture strength 621 MPa, and Young's modulus of 290 GPa. [on SciFinder(R)]