Boriding of Equiatomic Fe-Mn Binary Alloy

Pack-boriding of low alloy steel: microstructure evolution and migration behaviour of alloying elements

“…The concentrations of Cr, Mn, Mo, and Ni show an increasing trend from the surface to the tip of the boride column, which is possible due to the redistribution of the alloying elements (boride has different solubilities for different elements) and nonequilibrium conditions that prevail during the growth of boronized layer [1,23]. A similar trend in the distribution of alloying elements is evident for the boronized Fe-Cr [1] and Fe-Mn [5,6] alloys. The presence of Si and Al in the boronized region at the location of EPMA measurements, especially, near to the surface is associated with their However, it should be remembered that the iron-boride columns do not absorb the entire concentration of the element present in the alloy (Fig.…”

“…Boronizing, a thermo-chemical treatment, is accompanied by the controlled diffusion of boron into the metal surface producing different phases of metal borides (M-B, M = Fe, Cr, Ti, Ni, V, Mo, Mn, W, etc.) [4][5][6][7][8][9][10][11][12][13][14]. A considerable improvement in the quality of the surface layer is possible through combining the boronizing treatment with other surface treatments (like borocaburising, laser treatment on the boronized surface, etc.)…”

“…The alloying chemistry has a significant influence on the boronizing behavior. The effect of various chemical elements on the boronizing response of pure iron was the subject of attraction in many kinds of literature [5][6][7][8][9][10][11][12]. The microstructure of the boronized layer, especially, the morphology of borides is dependent on the alloys, where the alloying elements can modify the solubility and diffusion of constituents [16,23].…”

Synthesis of amorphous manganese borohydride in the (NaBH 4 –MnCl 2 ) system, its hydrogen generation properties and crystalline transformation during solvent extraction

“…They based their suggestion on the theoretical calculations of the Mn K-edge XANES spectra of different manganese borides. However, from the metallurgical viewpoint, the formation of manganese borides at low temperatures (100-160 °C), at which the decomposition of Mn(BH 4 ) 2 was investigated in this work, is highly unlikely because manganese borides require very high temperatures ( > 900 °C) and/or high pressures for their formation [29,30] . Furthermore, mechano-chemically synthesized Mn(BH 4 ) 2 in the present work is amorphous so its thermolysis path may not be the same and necessarily involve a formation of manganese borides as suggested http://engine.scichina.com/doi/10.1016/j.jechem.2016.08.011 by Guda et al .…”

“…R.A. Varin et al / Journal of EnergyChemistry 26 (2017) [24][25][26][27][28][29][30][31][32][33][34] …”