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A platform for research: civil engineering, architecture and urbanism
The invention discloses a preparation method of a self-lubricating ZrB2-ZrO2-CaF2 ceramic material, relating to a ceramic material. The self-lubricating ZrB2-ZrO2-CaF2 ceramic material is prepared by taking ZrB2 nanopowder, ZrO2 nanopowder and CaF2 nanopowder as raw materials. The preparation method comprises the steps of firstly, washing the raw materials by using a hydrofluoric acid water solution, and then, washing with deionized water and absolute ethyl alcohol; respectively weighing pretreated raw materials including the ZrB2 nanopowder and the ZrO2 nanopowder according to the volume percent, namely 60.0-69.0% of ZrB2, 17.0-36.0% of ZrO2 and 4.0% of CaF2, and then, proportioning, stirring, dispersing and carrying out ball milling for the first time to obtain refined powder; then, adding the refined CaF2 nanopowder into a deionized water vessel, and carrying out ultrasonic stirring and the like; next, carrying out ball milling for the second time; and finally, carrying out spark plasma sintering to obtain the cutter material disclosed by the invention. The prepared cutter material is suitable for high and low temperatures and has the characteristics of fine particle size, distribution uniformity, high hardness, bending strength and fracture toughness, good high and low temperature stability and the like.
The invention discloses a preparation method of a self-lubricating ZrB2-ZrO2-CaF2 ceramic material, relating to a ceramic material. The self-lubricating ZrB2-ZrO2-CaF2 ceramic material is prepared by taking ZrB2 nanopowder, ZrO2 nanopowder and CaF2 nanopowder as raw materials. The preparation method comprises the steps of firstly, washing the raw materials by using a hydrofluoric acid water solution, and then, washing with deionized water and absolute ethyl alcohol; respectively weighing pretreated raw materials including the ZrB2 nanopowder and the ZrO2 nanopowder according to the volume percent, namely 60.0-69.0% of ZrB2, 17.0-36.0% of ZrO2 and 4.0% of CaF2, and then, proportioning, stirring, dispersing and carrying out ball milling for the first time to obtain refined powder; then, adding the refined CaF2 nanopowder into a deionized water vessel, and carrying out ultrasonic stirring and the like; next, carrying out ball milling for the second time; and finally, carrying out spark plasma sintering to obtain the cutter material disclosed by the invention. The prepared cutter material is suitable for high and low temperatures and has the characteristics of fine particle size, distribution uniformity, high hardness, bending strength and fracture toughness, good high and low temperature stability and the like.
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