Patent ID: 7741254
Filing Date: 2010-06-22
Classification: B22F,C10M,C10N,C22C

Abstract:
1. A method for producing a dense matrix composite material with intrinsic low coefficient of friction and high wear resistance, comprising: a. providing at least one sinterable matrix material in particulate form with the particle diameter not exceeding 20 μm, b. providing a volume of hexagonal boron nitride in particulate form equal to 5-20% of the volume of said sinterable matrix material, c. deaggregating said hexagonal boron nitride and coating at least 25% of the surface of said deaggregated hexagonal boron nitride with at least one suitable surfactant to impede its reaggregation, d. dispersing said surfactant-coated, deaggregated hexagonal boron nitride and said sinterable matrix material in an organic thermoplastic binder to form a homogeneous moldable compound, e. shaping green bodies from said moldable compound and extracting substantially all of said organic thermoplastic binder from said green bodies, f. sintering said binder-free green bodies into dense bodies at temperatures at which any liquid phase generated during sintering does not impair the integrity of the sintered bodies.