Method for preparing continuous zirconium boride ceramic precursor fiber

Abstract

The invention relates to a method for preparing a continuous zirconium boride ceramic precursor fiber. The method comprises the following steps: 1, adjusting the pH value of a prepared zirconium boride precursor solution to 4-5, mixing with an alcoholic solution of polyethylene, adding a surfactant, concentrating, and deaerating to obtain a zirconium boride ceramic fiber precursor spinning solution; and 2, carrying out continuous spinning by allowing the zirconium boride ceramic fiber precursor spinning solution to go through a metering pump, a spinning casing and a spinneret under 1-50MPa, and carrying out dry molding and reeling of spinning channels. The preparation method is simple, and the prepared spinning solution is uniform and has a good spinnability; and the continuous and uniform kilograme-level zirconium boride ceramic precursor fiber can be prepared through adopting a dry spinning device in the invention.

Description

technical field

[0001] The invention belongs to the field of preparation of high-temperature ceramic precursor fibers, in particular to a method for preparing continuous zirconium boride ceramic precursor fibers. Background technique

[0002] At present, many aspects, especially in the fields of national defense and aerospace, put forward high requirements on the properties of materials such as high strength, high temperature resistance, oxidation resistance, and wear resistance. In some key parts of aircraft, it is especially necessary to develop new high-performance materials. . High-performance ceramic fibers are widely used due to their excellent performance.

[0003] Zirconium boride (ZrB 2 ) has the advantages of high hardness, modulus, thermal conductivity, etc., and at the same time low density, good thermal shock resistance, low resistance, melting point can reach above 3000 ° C, and the chemical bond is extremely strong, has good chemical stability, can meet A s...