Accession Number : ADD002197
Title : Hot Pressed, High Strength Silicon Nitride.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON D C
Personal Author(s) : Gazza,George E
Report Date : 20 Aug 1974
Pagination or Media Count : 3
Abstract : The patent relates to the fabrication of high strength, high density, silicon nitride by the addition of between 1.0 to 3.5 percent by weight of yttrium in the form of a compound to silicon nitride powder and pressing the material at temperatures of between 1,750C. and 1,800C. and at uniaxial pressures of between 6,000 and 7,000 psi.
Descriptors : *Silicon nitrides, *Patents, Additives, Yttrium, Hot pressing
Subject Categories : Ceramics, Refractories and Glass
Distribution Statement : APPROVED FOR PUBLIC RELEASE