Fabrication of bulk Al2O3 by combustion synthesis melt-casting under ultra-high gravity

Combustion Synthesis: An Update

“…The above results have been consistent in other experiments involving the same product, such as the one carried out by Pei et al [77] , where they experimented with the bulk fabrication of Al 2 O 3 alone. The method was similar using a centrifugal machine with the aid of gravity.…”

“…Although there is not a big difference in the results, it was found that pure Al 2 O 3 forms at 200 g ' s along with metal Ni and pores. In a related note, the production of Al 2 O 3 /ZrO 2 in a nanoscale is another effort, which has been studied by Pei et al [77] , where application of 800 g ' s resulted in high density, and the orientation growth of the microstructures along the axis of gravity was similar to the results reported by Zhao et al All other properties resemble the above -stated descriptions. There have been a number of ways this ceramic has been tested and evaluated by means of CS with the aid of gravity, most of which have the same results.…”

Hybrid processing and anisotropic sintering shrinkage in textured ZnO ceramics

“…Unlike metals, ceramics are difficult to texture via thermal gradients and there are only few reports on this subject. Textured Al 2 O 3 was produced via non-equilibrium solidification evoked by combination of a combustion synthesis and ultrahigh centrifugal force [6]. Although this texture was attributed to the ultrahigh gravity field by the authors, it might as well be classified as a hybrid method since non-equilibrium solidification also played a role in the formation of non-conventional, arrayed grain microstructure.…”

Predicting the Adiabatic Temperature of Transparent Y<SUB>3</SUB>Al<SUB>5</SUB>O<SUB>12</SUB> Prepared via Combustion Synthesis under Ultra-High Gravity

“…Even though the higher the adiabatic temperature, the more easily and completely the mixture composite can be separated. 23,27,28) The preheating temperature of reactants should not be above 620 K. This research results have important directive to the production practices.…”

“…27,28) The procedure parameters included an acceleration of 800 g, a pressure chamber with 10 À5 MPa, and cooling in the chamber after the thermit finished. Based on the results of the adiabatic temperature of the Al/NiO/Y 2 O 3 system, the preheating temperature for the powder mixture is 573 K. Fig.…”