Publications

1989
Shih, W. Y. ; Shih, W. H. ; Liu, J. ; Aksay, I. A. STABILITY OF A BINARY COLLOIDAL SUSPENSION AND ITS EFFECT ON COLLOIDAL PROCESSING; Aksay, I. A. ; McVay, G. L. ; Ulrich, D. R., Ed. Materials Research Soc: Pittsburgh, 1989; Vol. 155, pp. 73-82.
Shih, W. Y. ; Shih, W. H. ; Aksay, I. A. THE STABILITY OF BINARY CHARGED COLLOIDAL CRYSTALS. Journal of Chemical PhysicsJournal of Chemical Physics 1989, 90, 4506-4512.
1988
Schilling, C. H. ; Samuels, W. D. ; Aksay, I. A. ANALYSIS OF PACKED-PARTICLE REARRANGEMENT DURING COLLOIDAL CERAMIC PROCESSING - GAMMA-RAY DENSITOMETRY AND A REVIEW OF ALTERNATIVE METHODS; Young, W. S. ; McVay, G. L. ; Pike, G. E., Ed. Amer Ceramic Soc: Westerville, 1988; Vol. 5, pp. 181-198.
Carty, W. M. ; Stangle, G. C. ; Laine, R. M. ; Youngdahl, K. A. ; Sarikaya, M. ; Aksay, I. A. FABRICATION OF HIGH-TC CERAMIC SUPERCONDUCTING FIBERS FROM ORGANOMETALLIC PRECURSORS. Sampe Quarterly-Society for the Advancement of Material and Process EngineeringSampe Quarterly-Society for the Advancement of Material and Process Engineering 1988, 20, 3-6.
Aksay, I. A. FORMING OF CERAMIC MATRIX COMPOSITES WITH COLLOIDS. Abstracts of Papers of the American Chemical SocietyAbstracts of Papers of the American Chemical Society 1988, 195, 63-COLL.
Stangle, G. C. ; Rhee, D. J. ; Aksay, I. A. A MODEL OF MOMENTUM, HEAT, AND MASS-TRANSFER WITH CHEMICAL-REACTION IN A DISORDERED POROUS-MEDIUM. Abstracts of Papers of the American Chemical SocietyAbstracts of Papers of the American Chemical Society 1988, 195, 65-COLL.
Laine, R. M. ; Yogo, T. ; McElhaney, S. K. ; Yin, T. K. ; Youngdahl, K. A. ; Aksay, I. A. ORGANOMETALLIC PRECURSORS TO HIGH-TC CERAMIC SUPERCONDUCTORS. Abstracts of Papers of the American Chemical SocietyAbstracts of Papers of the American Chemical Society 1988, 195, 431-INOR.
Cesarano, J. ; Aksay, I. A. PROCESSING OF HIGHLY CONCENTRATED AQUEOUS ALPHA-ALUMINA SUSPENSIONS STABILIZED WITH POLY-ELECTROLYTES. Journal of the American Ceramic SocietyJournal of the American Ceramic Society 1988, 71, 1062-1067.
Cesarano, J. ; Aksay, I. A. ; Bleier, A. STABILITY OF AQUEOUS ALPHA-AL2O3 SUSPENSIONS WITH POLY(METHACRYLIC ACID) POLY-ELECTROLYTE. Journal of the American Ceramic SocietyJournal of the American Ceramic Society 1988, 71, 250-255.
Sarikaya, M. ; Kikuchi, R. ; Aksay, I. A. STRUCTURE AND FORMATION OF TWINS IN THE ORTHORHOMBIC YBA2CU3O7-X. Physica CPhysica C 1988, 152, 161-170.
Yin, T. K. ; Aksay, I. A. ; Eichinger, B. E. THE STUDY OF POLY(OCTADECYL METHACRYLATE) AS A SURFACTANT IN THE PROCESSING OF ALUMINA POWDERS. Abstracts of Papers of the American Chemical SocietyAbstracts of Papers of the American Chemical Society 1988, 196, 65-IEC.
Sonuparlak, B. ; Aksay, I. A. Manufacture of porous ceramics using decomposable polymeric microspheres, and the resultant products, 1988.Abstract
The title porous ceramics, having a controlled microstructure consisting of pores of predetd. size, shape, and spatial distribution, are prepd. by (a) forming a colloidal suspension of ceramic material and uniform and identical polymeric microspheres, (b) stabilizing the interaction between the microspheres and the ceramic particles, (c) consolidating the colloidal suspension by removing the liq. and forming a compact body, and (d) heating the body to decomp. the microspheres and sintering the body to obtain a porous ceramic body having multiple, evenly distributed, noncontiguous pores. These porous ceramics are useful for a variety of applications, including multilayer tape casting. A 54-vol.% aq. α-Al2O3 suspension was prepd. using 0.5 wt.% NH4 salt of polyacrylic acid as anion surfactant and 0.08 wt.% (based on dry Al2O3) citric acid as a stabilizer. The suspension was treated with ultrasound to break up agglomerates with a polystyrene suspension (30-40 vol.%), and the colloidal suspension was then slip-cast, dried, and sintered to form a single porous layer, that was slowly dried, heated to 1000° at 22.5°/h, and sintered at 1550° to obtain a ceramic body with controlled microstructure. [on SciFinder(R)]
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)]
1986
Gallagher, D. ; Cesarano, J. ; Aksay, I. A. SURFACTANT-SOLVENT EFFECTS IN DISPERSED CERAMIC SYSTEMS. Abstracts of Papers of the American Chemical SocietyAbstracts of Papers of the American Chemical Society 1986, 191, 223-COLL.
Halverson, D. C. ; Pyzik, A. J. ; Aksay, I. A. Boron-carbide-aluminum and boron-carbide-reactive metal cermets, 1986.Abstract
Cermets based on a ternary system with B, C, and a reactive metal are manufd. with controlled structures having ≥1 ceramic phases distributed in an alloy matrix. A starting compn. as well as reaction temp., time, and atm. are selected for controlling the manufg. process and final structures, with emphasis on initial powder consolidation, early melt wetting, and final sintering. Surfactant selection is considered for obtaining a uniform blend of initial feed powders having particle size of ≤5 μ. Thus, powd. B4C (av. size 5 μ) 80 and Al 20 vol.% were mixed in EtOH by using an ultrasonic probe, and slip cast in a mold from plaster of Paris for dewatering. The powder mixt. removed from the mold was pressed at 10,000 psi and room temp. Pellet preforms were heated in 10 min to 1050° in a furnace, and then sintered at 800° for 24 h. The final composite contained an unknown Al-rich phase 34, B4C 32, AlB2 23, Al 5, α-AlB12 3, Al4C3 2, and AlB12C2 1 vol.%. The unknown phase showed crystallog. structure intermediate between hexagonal and rhombohedral. Cermet products of this type showed bend strength >110 kpsi and fracture toughness 12 kpsi-in.0.5, with the latter exceeding the value of ∼4 for conventional Al2O3-B4C composites. [on SciFinder(R)]
1984
Aksay, I. A. DEFECTS IN COLLOIDAL CRYSTALS. American Ceramic Society BulletinAmerican Ceramic Society Bulletin 1984, 63, 1003-1003.
Sarikaya, M. ; Aksay, I. A. MICROSTRUCTURAL EVOLUTION IN LIQUID-PHASE SINTERED SI3N4. American Ceramic Society BulletinAmerican Ceramic Society Bulletin 1984, 63, 1000-1000.
Yasrebi, M. ; Aksay, I. A. MICROSTRUCTURAL UNIFORMITY IN CERAMIC-ORGANIC BINDER SYSTEMS. American Ceramic Society BulletinAmerican Ceramic Society Bulletin 1984, 63, 999-999.
Sonuparlak, B. ; Aksay, I. A. MULLITE FORMATION WITH MOLECULARLY MIXED SIO2-AL2O3. American Ceramic Society BulletinAmerican Ceramic Society Bulletin 1984, 63, 994-994.
Kim, S. I. ; Aksay, I. A. PRESSURE FILTRATION OF COLLOIDAL SYSTEMS. American Ceramic Society BulletinAmerican Ceramic Society Bulletin 1984, 63, 998-998.
Halverson, D. C. ; Pyzik, A. J. ; Aksay, I. A. PROCESSING AND MICROSTRUCTURAL CHARACTERIZATION OF B4C/AL CERMETS. American Ceramic Society BulletinAmerican Ceramic Society Bulletin 1984, 63, 1477-1477.
Milius, D. L. ; Pyzik, A. J. ; Aksay, I. A. SINTERING OF SIC WITH LIQUID ALUMINUM. American Ceramic Society BulletinAmerican Ceramic Society Bulletin 1984, 63, 1001-1001.
Han, C. ; Aksay, I. A. UNIFORM DENSIFICATION OF BIMODAL PARTICLE-SYSTEMS. American Ceramic Society BulletinAmerican Ceramic Society Bulletin 1984, 63, 991-991.
1983
Pyzik, A. J. ; Aksay, I. A. DEVELOPMENT OF B4C/CU-ALLOY CERMETS. American Ceramic Society BulletinAmerican Ceramic Society Bulletin 1983, 62, 873-873.
Sarikaya, M. ; Aksay, I. A. MULLITIZATION OF KAOLINITE. American Ceramic Society BulletinAmerican Ceramic Society Bulletin 1983, 62, 869-869.
Allman, R. M. ; Aksay, I. A. PARTICLE CLUSTERING IN THE COLLOIDAL SIO2 SYSTEM. American Ceramic Society BulletinAmerican Ceramic Society Bulletin 1983, 62, 866-866.
Schilling, C. H. ; Aksay, I. A. PORE STRUCTURE OF ALPHA-AL2O3 COMPACTS CONSOLIDATED BY FILTRATION. American Ceramic Society BulletinAmerican Ceramic Society Bulletin 1983, 62, 869-869.
Halverson, D. C. ; Aksay, I. A. PROCESSING OF B4C/AL CERMETS. American Ceramic Society BulletinAmerican Ceramic Society Bulletin 1983, 62, 873-873.
Lange, F. F. ; Davis, B. I. ; Aksay, I. A. PROCESSING-RELATED FRACTURE ORIGINS .3. DIFFERENTIAL SINTERING OF ZRO2 AGGLOMERATES IN AL2O3/ZRO2 COMPOSITE. Journal of the American Ceramic SocietyJournal of the American Ceramic Society 1983, 66, 407-408.
Aksay, I. A. ; Lange, F. F. ; Davis, B. I. UNIFORMITY OF AL2O3-ZRO2 COMPOSITES BY COLLOIDAL FILTRATION. Journal of the American Ceramic SocietyJournal of the American Ceramic Society 1983, 66, C190-C192.
1982
Schilling, C. H. ; Aksay, I. A. ; Lange, F. F. FACTORS CONTROLLING PACKING UNIFORMITY DURING COLLOIDAL FLASH FILTRATION. American Ceramic Society BulletinAmerican Ceramic Society Bulletin 1982, 61, 952-952.
Yasrebi, M. ; Aksay, I. A. ; Lange, F. F. KINETICS OF FLOCCULATION IN AQUEOUS ALPHA-AL2O3 SUSPENSIONS. American Ceramic Society BulletinAmerican Ceramic Society Bulletin 1982, 61, 952-952.
Halverson, D. C. ; Aksay, I. A. ; Snowden, W. E. SINTERING OF B4C-METAL COMPOSITES. American Ceramic Society BulletinAmerican Ceramic Society Bulletin 1982, 61, 952-952.
1981
Aksay, I. A. ; Ogurtani, T. O. Kinetics of Colloid Consolidation by Filtration. American Ceramic Society Bulletin 1981, 60, 925-925.
Knapp, W. J. ; Aksay, I. A. ; Flood, H. Structural Models for Melts in the System Al2O3-SiO2. American Ceramic Society Bulletin 1981, 60, 924-924.
Sarikaya, M. ; Aksay, I. A. ; Sonuparlak, B. A Study of Kaolinite Reaction-Series by TEM and XRF. American Ceramic Society Bulletin 1981, 60, 924-924.
1979
Aksay, I. A. ; Pask, J. A. ; Davis, R. F. Densities of SiO2-Al2O3 Melts. Journal of the American Ceramic Society 1979, 62, 332-336.
1976
Liang, K. S. ; Salaneck, W. R. ; Aksay, I. A. X-Ray Photoemission Studies of Thin Gold-Films. Solid State Communications 1976, 19, 329-334.
1975
Aksay, I. A. ; Pask, J. A. Stable and Metastable Equilibria in System SiO2-Al2O3. Journal of the American Ceramic Society 1975, 58, 507-512.
1974
Aksay, I. A. ; Pask, J. A. Silica-Alumina System - Stable and Metastable Equilibria at 1.0 Atmosphere. Science 1974, 183, 69-71.
Aksay, I. A. ; Hoge, C. E. ; Pask, J. A. Wetting Under Chemical-Equilibrium and Nonequilibrium Conditions. Journal of Physical Chemistry 1974, 78, 1178-1183.
1973
Aksay, I. A. ; Davis, R. F. ; Pask, J. A. Diffusion in Mullite (3Al2O3·2SiO2). American Ceramic Society Bulletin 1973, 52, 710-710.
Aksay, I. A. ; Pask, J. A. Diffusion Studies in SiO2-Al2O3 Melts. American Ceramic Society Bulletin 1973, 52, 710-710.
Raju, A. P. ; Aksay, I. A. ; Pask, J. A. Permeation of Silicates in Magnesia and Forsterite Compacts. American Ceramic Society Bulletin 1973, 52, 166-169.
Aksay, I. A. ; Pask, J. A. Stable and Metastable Equilibria in SiO2-Al2O3 System. American Ceramic Society Bulletin 1973, 52, 348-348.
1972
Davis, R. F. ; Aksay, I. A. ; Pask, J. A. Decomposition of mullite. Journal of the American Ceramic Society 1972, 55, 98-&.
Aksay, I. A. ; Davis, R. F. Densities of SiO2-Al2O3 Melts. American Ceramic Society Bulletin 1972, 51, 720-&.

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