Production of ferroboron powders by solid boronizing method

Investigation of diffusion kinetics of plasma paste borided AISI 8620 steel using a mixture of B 2 O 3 paste and B 4 C/SiC

“…While the lowest hardness obtained was 1583 HV 0,05 for 70% B 2 O 3 + 30% SiC boron paste mixture for 2 h at 973 K, the highest hardness was found for 30% B 2 O 3 + 70% B 4 C paste for 7 h at 1073 K at 1992 HV 0,05 . Along with the increase in boriding temperature and time (Ozbek et al 2002;Culha et al 2008;Sahin et al 2010), hardness of the boride layer increased due to the FeB phase. Tabur et al (2009) pack borided AISI 8620 steel at temperatures of 1123, 1173, and 1223 K for 2, 4 and 6 h and they found that the surface hardness of boriding steel was 1650 and 1860 HV 0.1 for 2 h at 1123 and 1223 K for 6 h, respectively.…”

Study on the synthesis behavior of Fe–W–B powders and the preparation of bulk

“…Since the reactive synthesis of FeWB alloy powders depended on a solid diffusion process, the interparticle distance generally increased with larger particles, thus enlarging the difficulty of complete reaction. Therefore, Fick's second law is reduced to a simple form as given below for the case where a special concentration of the diffusing element is desired in the diffused metal or alloy [24].…”

Multi-component boron and niobium coating on M2 high speed steel processed by powder metallurgy

“…In these calculations, the mass ratio was considered mNb/mB=4.5, where mNb is the niobium mass and mB is boron mass; in addition, 3 g of NH4Cl was adopted [23][24][25][26][27][28][29].…”