Wear-resistant and anti-corrosion composite ceramics for industrial high-temperature pipelines and preparation method thereof
A composite ceramic and high-temperature technology, which is applied in the field of wear-resistant and anti-corrosion composite ceramics and its preparation, can solve the problems of low tensile strength, cracking and peeling off of refractory materials, damage, etc., to improve wear resistance and corrosion resistance, and reduce temperature And the required pressure, the effect of the preparation process is easy to operate
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Embodiment 1
[0026] 30% alumina, 10% mullite, 8% silicon carbide, 3% silicon nitride, 3% magnesium oxide, 3% zirconia, 2% boron nitride, 0.5% β-SiC whisker, 0.2% TiC , Kaolin fiber 0.2%, the balance is tabular corundum.
[0027] Step 1: Take the raw materials of each component according to the mass ratio, make them into powders with a particle size of less than 1 μm and mix them evenly, then mix the above mixture with water according to the mass ratio of 1:7.5 and stir to form a fluid gel shape mixture.
[0028] The second step: the product obtained in the first step is placed in a graphite mold and then subjected to heat and pressure treatment. At 1600 ° C, the mold is subjected to 250Kg / cm 2 The pressure is applied to the shape of the green body in the mold, and then the green body is cooled to obtain wear-resistant and anti-corrosion composite ceramics for industrial high-temperature pipelines.
[0029] The properties of the wear-resistant and anti-corrosion composite ceramics used in...
Embodiment 2
[0032] 40% alumina, 20% mullite, 15% silicon carbide, 5% silicon nitride, 5% magnesium oxide, 5% zirconia, 5% boron nitride, β-SiC whisker 1.5%, TiC 0.5% , Kaolin fiber 0.5%, the balance is tabular corundum.
[0033] Step 1: Take the raw materials of each component according to the mass ratio, make them into powders with a particle size of less than 1 μm and mix them evenly, then mix the above mixture with water according to the mass ratio of 1:7.5 and stir to form a fluid gel shape mixture.
[0034] The second step: the product obtained in the first step is placed in a graphite mold and then subjected to heat and pressure treatment. At 1800 ° C, the mold is subjected to 350Kg / cm 2 The pressure is applied to the shape of the green body in the mold, and then the green body is cooled to obtain wear-resistant and anti-corrosion composite ceramics for industrial high-temperature pipelines.
[0035] The properties of the wear-resistant and anti-corrosion composite ceramics used i...
Embodiment 3
[0038] 33% alumina, 13% mullite, 10% silicon carbide, 3% silicon nitride, 3% magnesium oxide, 3% zirconia, 2% boron nitride, 0.5% β-SiC whisker, 0.2% TiC , Kaolin fiber 0.2%, the balance is tabular corundum.
[0039] Step 1: Take the raw materials of each component according to the mass ratio, make them into powders with a particle size of less than 1 μm and mix them evenly, then mix the above mixture with water according to the mass ratio of 1:7.5 and stir to form a fluid gel shape mixture.
[0040] The second step: the product obtained in the first step is placed in a graphite mold and then subjected to heat and pressure treatment. At 1600 ° C, the mold is subjected to 250Kg / cm 2 The pressure is applied to the shape of the green body in the mold, and then the green body is cooled to obtain wear-resistant and anti-corrosion composite ceramics for industrial high-temperature pipelines.
[0041] The properties of the wear-resistant and anti-corrosion composite ceramics used i...
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