Nitrides, combustion synthesis

I / Combustion Synthesis ( Nitrides for Development of Ceramic Materials of New Generation... 

In the field of high-temperature combustion synthesis, metals have been reacted with nitrogen, both in the gaseous and liquid phases, to form refractory nitrides [2], In most cases, this nitriding process is heterogeneous. 

Combustion synthesis of transition metal nitrides an overview 233... 

Combustion synthesis of metal nitrides from a solid nitrogen source was first investigated by Petrov in 1975.32 He used barium azide (Ba2N6) powder for the synthesis of TiN and Mg3N2. Holt, in 1983,33 reported the synthesis of TiN by using sodium azide (NaN3)as the solid nitrogen source. 

The combustion synthesis of TiN under high nitrogen pressure was investigated by Borovinskaya and Loryan34 in 1978. They produced TiN from titanium diluted with 50% TiN at PN2 of 400 MPa. Hirao et al.35 36 studied the combustion of Ti, Zr and Ta samples diluted with 50% of their nitrides, under high nitrogen pressure (up to 25 MPa) and produced stoichiometric nitrides. 

A theoretical analysis of combustion synthesis of refractory nitrides was presented by Munir and Holt in 1987.37 They predicted the existence of an activation energy due to chemical reaction or mass-transport. Glassman et al. in 1987,38 in their thermodynamic analysis of TiN formation, examined the possibility of creating TiN by a self-sustained reaction of the metal particles and nitrogen gas in a rocket motor. They reported that for the stoichiometric ratio of 0.5 mole N2/mole titanium, the reaction has... 

Combustion synthesis of boron nitride powder, BN, was reported in one of the earliest works on SHS (Merzhanov and Borovinskaya, 1972). The mechanisms of combustion and product structure formation from elements were later investigated (Mukasyan and Borovinskaya, 1992). More recently, finely dispersed hexagonal boron nitride powder has been obtained from reduction-type reactions (Borovinskaya et fl/., 1991). 

Brezinsky, K., Brehm, J. A., Law, C. K., and Glassman, I., Supercritical combustion synthesis of titanium nitride. Twenty-sixth Symposium (International) of Combustion. The Combustion Institute, Pittsburgh, 1875 (1996). 

Eslamloo-Grami, M., and Munir, Z. A., Effect of porosity on the combustion synthesis of titanium nitride. J. Am. Ceram. Soc., 73, 1235 (1990a). 

---