@misc{121566,
  keywords = {composite aluminum alloy boron carbide},
  author = {Aleksander J. Pyzik and Ilhan A. Aksay},
  title = {A multipurpose boron carbide-aluminum composite and its manufacture via the control of the microstructure},
  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{\textdegree} 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{\textdegree}; (4) heat treatment at \<1800{\textdegree}. Optionally, the porous compact is sintered at \~{}1800-2250{\textdegree} 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{\textdegree}, and 24 h at 110{\textdegree}, and heat treated 30 min at 2150{\textdegree}. The resulting compact was infiltrated with molten Al in a graphite furnace under vacuum at 1190{\textdegree} 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{\textquoteright}s modulus of 290 GPa. [on SciFinder(R)] },
  year = {1987},
  volume = {4,702,770},
  chapter = {US},
  pages = {41 pp.},
  publisher = {Washington Research Foundation, USA .},
  address = {United States of America},
  isbn = {WO8700557A2},
  language = {eng},
}