Nitriding degree

Nitriding Degree of Combustion Products and Burning Rate Versus Main SHS Parameters... 

Dependence of nitriding degree on sample diameter has an extremum (Figure 7.3). For the ferrosilicon used for the study (containing 80.1% of silicon), the maximum of nitriding degree is achieved with a sample diameter of 50 mm. 

Figure 1.1 Dependence of nitriding degree (m 1) and burning rate (U 2) of ferrosilicon on nitrogen pressure.

Thus, the unstable (self-oscillating) combustion of ferrosilicon in nitrogen is accompanied by a low nitriding degree of combustion products and leads to their chemical and phase inhomogeneity. SHS process control is required to achieve the phase and chemical homogeneity of SHS products and the maximum (m = 1)... 

Figure 7.16 Dependence of nitriding degree of combustion products of ferrovanadium in nitrogen on Fe content. 1 - non-quenched combustion products and 2 - quenched combustion products.

During combustion of ferrotitanium in the presence of ammonium chloride as an additive, values of nitriding degree and burning rate are much lower than corresponding values during combustion of ferrotitanium without this additive. 

Figure 7.24 The curve illustrating changes in nitriding degree along the diameter of the ferrotitanium sample burned in nitrogen.

Figure 7.25 Dependence of nitriding degree on nitrogen pressure 1 - Ti content = 30.6% and 2-Ti content = 65.9%.

Tabie 7.3 Influence of SHS conditions on nitriding degree of combustion products of different ferrotitanium types in nitrogen. 

Original composition Synthesis conditions, nitriding degree Detected phases Content of phases (vol%) Parameters of lattice (nm) Dimensions CSR > (nm) (Ad/. X 10-... 

Kobori, S Koike, S. Watanabe, S. Matsuzaki M. Matsuura, H. Akatsuka, H. (2004). Dependence of Nitriding Degree of Ti Surface by Non-LTE Nitrogen Plasma on Various Plasma Parameters. Thin Solid Films, Vol. 457, No. 1, (June 2004), pp. 69-77, ISSN 0040-6090... 

---