Method for low temperature rapid welding between ceramic or ceramic-based composite material and metal

Abstract

The present invention relates to a method for low temperature rapid welding between a ceramic or ceramic-based composite material and a metal, wherein current having a density of higher than a critical value is applied to a sample under a certain pressure (more than or equal to 1 MPa), and the low temperature rapid welding between zirconia or a zirconia-based composite material and a metal is achieved within a temperature range of 500-1200 DEG C, wherein the related ceramics comprise zirconium oxide, alumina, cerium oxide, bismuth oxide and composite materials thereof, lanthanum zirconate, lanthanum cobaltate, and the like, and the related metals comprise nickel, cobalt, iron, molybdenum, niobium, copper, aluminum, silver, platinum and other common metals and alloys thereof. According to the welding method of the present invention, by applying the electric field, the rapid welding between the materials within a certain temperature range is achieved, such that the temperature required by the welding is effectively reduced, and the welding speed is improved.

Description

technical field [0001] The invention belongs to a low-temperature rapid welding method between composite materials and metals, and relates to a low-temperature rapid welding method between ceramics or ceramic-based composite materials and metals. The minimum current density required to achieve rapid welding between samples) is a method to achieve rapid welding between materials. Background technique [0002] ZrO 2 The representative engineering ceramics have many excellent properties such as high temperature resistance, high strength, high hardness, high wear resistance, corrosion resistance, etc., and have important applications in metallurgy, aerospace, energy, machinery, optics and other fields. However, its poor processability, low ductility and impact toughness, weak thermal shock resistance, and difficulty in manufacturing large and complex parts limit the application of ceramic materials in engineering to a large extent. The plasticity and toughness of metal materia...

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Problems solved by technology

The document "Interfacial Phenomena During Field Zirconia to Metalst[J].Transactions of JWRI,1986,15,215–218." At 800°C, an electric field-assisted method was used to achieve welding between zirconia and metal nickel, but due to the current used / The voltage is small and does not reach the critical value, so its welding behavior is similar to ordinary welding without electric field assistance, and it still takes a long time (≥20min)

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