Mechanical-thermal synthesis of Al2O3-Cr composite powders

An investigation on the formation mechanism of nano CrB2 powder in the Mg–B2O3–Cr2O3 system

“…In comparison with the magnesiothermic reduction of B 2 O 3, Mg progressively reduces Cr 2 O 3 after a much longer time in the same experimental conditions. The result is in a good agreement with the report by Mocellin et al [25] on the mechanosynthesis of the alumina-chromium composites by displacement reactions between aluminum and chromia.…”

Al2O3-NixAl Based Cermets Prepared by in-situ Reactions

“…The appropriate amount of Al 2 0 3 (Martoxide), NiO (prepared at home from NiCI 2 ) and Al (Aldrich) as the main constituents and Ti (Merck) as the alloying additive (purity of all chemicals> 99 %) was attrition milled in hexane under argon for 4 br. The drying of the suspension and the subsequent manipUlations were done in air.…”

“…Displacement reactions are of interest for in-situ synthesis of powder or bulk ceramic-ceramic or ceramic-metal composites with novel microstructures and improved properties [2][3][4][5]. Any arbitrary oxide whose Gibbs energy of formation from elements is lower than that of alumina may be reduced by Al (aluminothermic reactions).…”

Self-ignited synthesis of nanocomposite powders induced by Spex mills; modeling and optimizing

“…The collected data from the previous works [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] are listed in Table 1. The ignition time of several self-sustaining Table 1 The gathered data as input and target for training and testing sets from the previous works.…”

“…[14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]). The review of the literature [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] reveals that due to complex geometry of the Spex mills, an accurate simulation of these mills has not been accomplished yet.…”