Preparation method of Al4SiC4-Al2O3-SiC composite material
A technology of al2o3-sic and composite materials, which is applied in the field of refractory materials, can solve the problems of low service life of furnace lining materials, poor resistance to slag erosion and permeability, poor erosion resistance, etc., and achieve excellent thermal shock resistance and corrosion resistance And the effect of good anti-permeation, excellent anti-erosion and anti-permeation
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Embodiment 1
[0017] Example 1: A kind of Al 4 SiC 4 Combined with Al2O 3 -SiC composite material preparation method,
[0018] In terms of weight percentage, the raw material composition is: 65% of 83 high alumina bauxite, 20% of SiC, 12% of activated alumina, 3% of metal aluminum powder, and 3% of phenolic resin as the binder.
[0019] During production, various raw materials are first weighed according to the ratio, mixed evenly, and then mixed to obtain mud, and then pressed into a shape by a friction press, dried at 120-250℃ for 10-25h, and then at 1300℃-1700℃ Sintering 5-12h in buried carbon atmosphere.
[0020] The powders are silicon carbide, activated alumina and metal aluminum powder with a particle size of less than 0.088 mm, and the aggregates are 83 high alumina bauxite and silicon carbide with a particle size of 3-1 mm and 1-0 mm.
[0021] The performance indicators of the obtained product are: apparent porosity 6.5%, bulk density 3.10 g / cm3, normal temperature compressive strength 185...
Embodiment 2
[0029] Example 2: The production process is the same as that of Example 1, except that:
[0030] A kind of Al 4 SiC 4 Combine Al 2 O 3 -The preparation method of SiC composite material, in terms of weight percentage, the raw material composition is: 70% 83 high alumina bauxite, 15% SiC, 10% activated alumina, 5% metal aluminum powder, plus 3% phenolic aldehyde The resin is the binder. The powders are silicon carbide, activated alumina and metal aluminum powder with a particle size of less than 0.088 mm, and the aggregates are 83 high alumina bauxite and silicon carbide with a particle size of 3-1 mm and 1-0 mm.
[0031] The performance indicators of the obtained product are: apparent porosity 5.8%, bulk density 3.13 g / cm3, normal temperature compressive strength 196MPa, thermal shock stability (1100℃, water cooling) 28 times, high temperature flexural strength 50 MPa, wear resistance 2.1 cc, its corrosion resistance and penetration are better.
Embodiment 3
[0032] Example 3: The production process is the same as that of Example 1, except that:
[0033] A kind of Al 4 SiC 4 Combine Al 2 O 3 -The preparation method of SiC composite material, in terms of weight percentage, the raw material composition is: 61% 83 high alumina bauxite, 15% SiC, 15% activated alumina, 7% metal aluminum powder, 2% carbon black, , 3% phenolic resin is added as a binder. The powders are silicon carbide, activated alumina and metal aluminum powder with a particle size of less than 0.088 mm, and the aggregates are 83 high bauxite and silicon carbide with a particle size of 3-1 mm and 1-0 mm.
[0034] The performance indicators of the obtained product are: apparent porosity 5.3%, bulk density 3.16 g / cm3, normal temperature compressive strength 208MPa, thermal shock stability (1100℃, water cooling) 32 times, high temperature flexural strength 59 MPa, wear resistance 1.8 cc, its corrosion resistance and penetration are better.
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