A kind of preparation method of high temperature resistant ceramic track

Abstract

The invention belongs to the technical field of novel material caterpillar bands and relates to a preparation method of a high-temperature-resistant ceramic caterpillar band. The process course comprises the three steps of preparing of powder, forming of a blank and microwave sintering. By taking aluminum oxide and 3Y-TZP micropowder as raw materials, the ceramic caterpillar band which is high in high-temperature strength, good in thermal shock property, wear-resistant, corrosion-resistant and good in dimensional stability is prepared by dispersing metastable tetragonal phase zirconium oxide particles into an aluminum oxide matrix by means of a dry pressing+isostatic pressing method and a microwave sintering techolgoy, wherein the microscopic structures are uniform fine grains 3Y-TZP-Al2O3. After sintering, the surface of the caterpillar band only needs to be polished, so that a grinding step after sintering is avoided. The service life is 10-20 times of that of a stainless steel caterpillar band, the manufacturing cost of the high-temperature-resistant ceramic caterpillar band is lowered, and the production links are reduced on the premise of improving the performance indexes, the product quality and the production efficiency of the ceramic material, so that the high-temperature-resistant ceramic caterpillar band is favorably promoted and used. The high-temperature-resistant ceramic caterpillar band is scientific and reasonable in principle, high in yield and environment-friendly and has a good industrial application prospect.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of new material crawlers, and relates to a preparation method of high-temperature-resistant ceramic crawlers. The two-phase composite ceramic material ZTA (zirconia toughened alumina ceramics) is used as a raw material, and dry pressing + isostatic pressing molding and microwave sintering are adopted. Technical preparation of high temperature resistant ceramic crawler used in crawler transmission tunnel kiln. Background technique: [0002] The crawler transmission tunnel kiln is the latest generation of high-temperature electric furnace in the existing technology. It is used in the production of powder metallurgy, ceramics, building materials and heat treatment industries. The crawler transmission tunnel kiln has three outstanding advantages: First, it saves the sagger Equal loading carrier, directly heats the product, reduces energy consumption by more than 50%, and has a significant energy-...

AI Technical Summary

Problems solved by technology

Compared with stainless steel materials, ceramic materials have good performance and low cost in the application of high-temperature resistant crawlers. At present, the problems restricting the development of ceramic crawlers mainly include high manufacturing cost and poor performance: after firing ceramic materials, the material hardness is very high. It is difficult to achieve near-net size, grinding is very difficult, the traditional method sample processing cost is high, resulting in high product price, unable to compete with metal and its composite materials, it is difficult to popularize and use, and the cost of ceramic machining almost accounts for the cost of ceramic manufacturing 1-2 / 3 of that; in addition, the dispersion of ceramic materials is large and the reliability is poor

As a key technology for preparing high-performance ceramic materials and components, molding technology is not only the premise of material design and material formulation, but also a particularly important link to reduce ceramic manufacturing costs and improve material reliability; The molding methods used in production are mainly the traditional methods of dry pressing, grouting molding and injection molding. Dry pressing can easily lead to uneven microstructure due to the friction resistance between the powder and the mold, and the gradient effect of force transmission. Slurry molding is easy to cause the problems of delamination and low strength of the green body; injection molding has the problems of high manufacturing cost and poor reliability

The single-mode or multi-mode reflective heating sintering in the prior art relies on the reflection of the cavity wall to form a standing wave to concentrate the energy for heat conduction heating, which has a large heating temperature gradient, uneven heating of materials, long heating time and energy consumption. big disadvantage

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