Application method of surface alloying ceramic

Abstract

The invention discloses a ceramic surface modified technology in the composite material preparing domain, which comprises the following steps: designing composite target through the method, alloying the common ceramic surface in the arc furnace to produce composite target with active metal titanium (or zirconium and hafnium) and other needed one or more metal materials (Fe, Ni, Mn, Mo, Cu, Al) according to certain proportion mechanically, evaporating or fusing the composite target acted by arc heat, impact ceramic surface at high speed under high electric field by metal ion.

Description

[0001] divisional application [0002] Original application number: 200410012575.1 [0003] Date of filing the original case: September 30, 2004 [0004] Title of original application: Preparation method of surface alloyed ceramics 1. Technical field [0005] The application method of the surface alloyed ceramics of the invention relates to the technical fields of ceramic surface modification technology and composite material preparation. 2. Background technology [0006] Ceramic materials have many advantages, such as high temperature resistance, corrosion resistance, high hardness, wear resistance, and good electrical insulation. Therefore, ceramic materials have been widely used. However, due to the inevitable disadvantages of ceramics, such as brittleness, strength dispersion and poor processability, the further use of ceramics is limited. Alloying the surface of ceramics to form surface alloyed ceramics is the main way to maximize the strengths and avoid weaknesses t...

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Problems solved by technology

The Mn-Mo method is to sinter Mn and Mo powder materials on the ceramic surface during the complex sintering process. This metallization process reduces the surface finish and performance of the ceramics; the vapor deposition metallization method is characterized by ceramics that do not withstand high temperatures. , can ensure the dimensional accuracy of the parts, the metallized film is continuous and dense, has good thermal conductivity, low high-frequency loss, and high strength, but it can only deposit a single metal element, so it can only be called a ceramic surface metallization method. In addition, because it has no activity The role of elements, the bonding strength of the metal layer and ceramics is low

[0008] Based on the beneficial effect of the chemical reaction between active element titanium and ceramics, the applicant has carried out arc glow titanium infiltration on the ceramic surface, but this method only makes the ceramic surface realize titanium metallization, the metal element is single, and the adaptability is poor , and due to the strong oxygen affinity of titanium, the metal titanium layer is easily oxidized by the atmosphere, and the formation of an oxide film is not conducive to the subsequent application process

For example, in the connection between ceramics and metals based on this, since the titanium layer permeated on the surface of the ceramics is difficult to react and mix with the solder during the brazing process, a layer of titanium is retained on the ceramic side of the ceramics and metal connection joints. layer, which affects the wetting and reaction of the solder and the ceramic, and directly affects the connection strength between the ceramic and the metal. The presence of a large number of intermetallic compounds on the ceramic side of the joint increases the brittleness of the joint, and it is prone to cracking under the action of residual stress

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