A fastener of heat-resistant high-strength carbon/ceramic material and its preparation method

Abstract

The invention discloses a heat-resistant high-strength carbon / ceramic material fastener and a preparation method thereof. The composition of its carbon / ceramic material is: 30-60% disordered carbon fiber; 10-18% carbon black; 10-20% silicon powder; 8-16% molybdenum powder; 6-12% silicon carbide ; 3-10% zirconia; 10-25% glue. Made by high temperature firing. The invention has very excellent high temperature resistance performance and excellent mechanical mechanical performance at high temperature, and also has good corrosion resistance performance and good processing performance, and can greatly reduce preparation and processing costs.

Description

Technical field: [0001] The invention relates to a high-temperature-resistant and high-strength ceramic material, in particular to a fastener and a connecting piece of carbon / ceramic material that can be used in various high-temperature furnaces and a preparation method thereof. Background technique: [0002] Ultra-high temperature (>1500°C) vacuum furnace is an important equipment for industrial production, especially for the production of new energy materials such as monocrystalline silicon and polycrystalline silicon, or high-performance special ceramics such as BN ceramics and nano-ceramics. This type of equipment involves a large number of connectors and fasteners at high temperatures. Under ultra-high temperature conditions, the service life of connectors or fasteners of general metal materials is very short, such as steel or iron fasteners In addition, the existing graphite material fasteners have low strength, and it is difficult to meet the technical requirements...

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Problems solved by technology

From the above process, it can be seen that the raw materials of carbon / carbon materials are expensive, the production process is complicated and the production cycle is very long, the energy consumption is large and the production cost is high, in addition, the product quality is not high, and the fasteners are easy to lose teeth, especially carbon / carbon The material has low oxidation resistance and poor ablation resistance, resulting in short service life of the product. Due to the above reasons, the problem of fasteners has become one of the important keys in the manufacture of high-temperature furnaces

Since the current ultra-high temperature vacuum furnaces in China have more than one million units, the annual use of fasteners or connectors exceeds tens of millions of sets (pieces). If the mission of fasteners or connectors is too short, their own The damage or replacement is a huge loss, and the associated production interruption, maintenance labor and other losses are even more huge

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