Ceramic part applied to aerospace field and preparation method of ceramic part

Abstract

The invention discloses a ceramic part applied to an aerospace field and a preparation method of the ceramic part, and belongs to the field of structural ceramics for aerospace. According to the ceramic part applied to the aerospace field, skeletons of flying birds are simulated, the ceramic part for the aerospace is divided into two parts of a main stress section (central shaft tube) and a connecting section (connecting part), manufactured separately, and then assembled together, the manufacturing difficulty is greatly lowered, standardization of workpieces is easy, a hollow structure in thecentral shaft tube can greatly decrease the dead weight of the ceramic part, by inserting a lightweight foam-shaped mixture into the central shaft tube, after a crack appears on the surface of the central shaft tube and develops rapidly, it is not prone to causing the central shaft tube to break directly, at the same time, pre-doped bacteria in the foam-shaped mixture are revived under the combined action of air and water and feed on the foam-shaped mixture for normal growth, and generated metabolic waste carbonate can fill the crack of the central shaft tube for temporary repairing of the central shaft tube.

Description

Technical field [0001] The invention relates to the field of structural ceramics for aerospace, more specifically, to a ceramic piece applied in the aerospace field and a preparation method thereof. Background technique [0002] Structural ceramics are advanced ceramics that have excellent mechanical, thermal, and chemical properties such as high temperature resistance, erosion resistance, corrosion resistance, high hardness, high strength, and low creep rate, and are commonly used in various structural components. Among them, boron nitride ceramics is a kind of A new type of structural ceramic material, it is a hexagonal crystal system with a scaly structure. Boron nitride ceramics have been developed with the development of aerospace and electronics industries, and have a wide range of industrial uses. Staff in related fields have begun to conduct a large number of this material since the end of the Second World War. Research work, until the hot pressing method was solved in r...

AI Technical Summary

Problems solved by technology

[0004] In order to reduce their own weight, birds make their own bones hollow. In addition, they also transform the rachis and quills in the feathers into hollow structures. Among them, the tubes of the rachis hide some A very light foam-like substance, which makes it easy for birds to fly. This special structure also prevents the wings of birds from breaking when they fly. The feathers are used to connect the feather shafts and the body of birds. The surface is covered with a large number of feathers, so the hollow structure of the rachis and feathers can greatly reduce the weight of the bird and reduce the weight of the bird's flight, but it is difficult for the ceramic parts as structural reinforcements to be the same as the bones or feathers of birds. , because during the flight of the aircraft, the fuselage of the aircraft may bear greater wind pressure, and the ceramic parts as structural reinforcements will be subject to greater external forces, which can easily lead to cracks on the surface or inside of the structural ceramics. When the ceramic parts are When it is a solid part, the crack development speed is at a normal speed, but when the ceramic part is a hollow pipe, stress concentration will appear on the inner wall of the ceramic, which will lead to accelerated crack development and cause ceramic parts to break and damage

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