Forming method adopting infiltration method to make reactive sintering silicon carbide ceramic and die
A technology for sintering silicon carbide and silicon carbide ceramics, applied in the field of materials science, can solve the problems of reducing yield and quality, organic matter removal process defects, silicon carbide body defects, etc. The effect of trimming process and uniform particle distribution
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Embodiment 1
[0065] This embodiment is mainly used to make ceramic products such as grinding buckets, slurry pumps or sandblasting nozzles.
[0066] 1), material preparation
[0067] 1.1), select silicon carbide powder with a mesh number of 40, a ratio of 60%, a mesh number of 240, a ratio of 10%, a mesh number of 1000, a ratio of 20%, a mesh number of 3000, a ratio of 3%, and a maximum particle size of less than 0.5 The micron ratio is 7% carbon material;
[0068] 1.2), select cotton cloth as the resin diffusion channel material, and the size and shape of the cotton cloth are made according to the design requirements in the mould;
[0069] 1.3), select an appropriate amount of thermosetting phenolic resin (strong base is catalyst) as binding agent; Select mixed acid as curing agent, the consumption of curing agent is 5% of resin;
[0070] 2) Pre-production work
[0071] 2.1), prepare the mould, spray the release agent on the inner surface of the mould, and do the demoulding treatment; ...
Embodiment 2
[0088] This embodiment is a method for making a silicon carbide ceramic sealing ring.
[0089] The friction coefficient of the "self-lubricating" sealing ring made of silicon carbide powder and graphite material is much lower than that of the sealing ring made of alumina ceramics and various hard alloys. Silicon carbide ceramics and graphite The abrasion resistance of sealing rings made of materials is much higher than that of graphite materials. Combined with the characteristics of corrosion resistance, high strength and high hardness of silicon carbide ceramics, the sealing rings made of silicon carbide ceramics and graphite materials are used in many harsh environments. It can also be used normally under the working conditions.
[0090] At present, the manufacturing process of silicon carbide ceramic sealing rings is mainly based on the use of nano-scale ultra-fine silicon carbide powder to sinter at normal pressure to make the seal ring, and the use of nano-scale ultra-fin...
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Abstract
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