Preceramic polymers to hafnium carbide and hafnium nitride ceramic fibers and matrices

Abstract

Hafnium containing preceramic polymer is made through the reaction of hafnium halide compound with any of the following compounds: ethylene diamine, dimethyl ethylene diamine, piperazine, allylamine and or polyethylene-imine.

What is claimed is:  
     
         1 . A hafnium carbide containing ceramic fiber derived from a preceramic polymer.  
     
     
         2 . A hafnium nitride containing ceramic fiber derived from a preceramic polymer.  
     
     
         3 . A hafnium containing preceramic polymer derived from the reaction of a hafnium containing halide compound and an amine containing organic compound.  
     
     
         4 . The preparation of a hafnium containing preceramic polymer through the reaction of hafnium halide compound with any of the following compounds; ethylene diamine, dimethyl ethylene diamine, piperazine, allylamine, or polyethylene-imine.  
     
     
         5 . The production of a hafnium carbide containing ceramic fiber comprising the steps of: 
 a. melting a hafnium containing preceramic polymer;    b. extruding said polymer through an orifice to form fiber;    c. cross-linking said fiber; and    d. heating said cross-linked fiber under controlled atmospheric conditions at a temperature greater than 600 degrees centigrade to obtain a hafnium carbide containing ceramic fiber.    
     
     
         6 . The production of a hafnium nitride containing ceramic fiber comprising the steps of: 
 a. melting a hafnium containing preceramic polymer;    b. extruding said polymer through an orifice to form a fiber.    c. cross-linking said fiber; and    d. heating said cross-linked fiber under in an ammonia containing atmosphere at a temperature greater than 600 degrees centigrade to obtain a hafnium nitride containing ceramic fiber.