Japan developed a wear-resistant high temperature resistant superplastic alumina ceramic
October 10, 2019
Abstract Alumina ceramics are widely used as abrasive materials, cutting materials, high temperature materials, and have good abrasion resistance, mechanical strength, hardness and wear resistance, and are also used in various mechanical parts. However, the original alumina ceramics cannot be processed like metal materials because of their non-plasticity.
Alumina ceramics are widely used as abrasives, cutting materials, high temperature materials, and have good abrasion resistance, mechanical strength, hardness and wear resistance, and are also used in various mechanical parts. However, since the original alumina ceramic is not plastic, it cannot be processed like a metal material, and it can be said that it is a material that is difficult to process.
Recently, the Institute of Metal Materials of the Japan Science and Technology Agency has developed a highly plasticized alumina ceramic that can be precision machined. According to reports, this ceramic is dispersed in the electrolyte aqueous solution of AI2O3 and Zr2O3 particles, prepared slurry, injected into the porous mold, pressurized into a billet, heated and sintered. Since it is an alumina sintered compact containing Zr2O3, the Zr2O3 alumina particles are in a highly dispersed state, and the crystals are fine particles, and have good superplasticity. The tensile test was carried out at 1400 ° C and 1500 ° C at a speed of 1 mm/min, and the measured value exceeded 200%. Because it makes up for the defect of the original alumina ceramic without plasticity, its use is further broadened.
