Fused diyttrium trioxide ceramic crucible for melting casting of titanium alloy and preparation method thereof

Abstract

The invention relates to the field of application of oxide ceramics, in particular to an electrical-melting yttrium oxide ceramic crucible for titanium alloy melting casting and a preparation method of the ceramic crucible. The ceramic crucible is prepared from, by oxide weight, 70%-99.5% of Y2O, 30%-0.5% of ZrO2 and not more than 0.5% of other trace impurities, wherein the trace impurities are oxides. The preparation method comprises the steps of conducting magnetic stirring melting on an yttrium oxide melting body through a high-frequency heating melting method for preparing a high-purity crystal material, crushing the yttrium oxide crystal for meeting the granularity and conducting shaping, sintering the yttrium oxide ceramic crucible and the like. The yttrium oxide ceramic crucible has the advantages of being free of adhesion and infiltration, good in thermal shock resistance, ultralong in service life and the like, the safe using temperature is below 2,300 DEG C, and the problems that due to the fact that the activity of a titanium alloy metal solution is high under high temperature, a chemical reaction is caused, the service life of the crucible is short, and the purity of titanium alloy is reduced due to disengagement after the reaction are solved.

Description

Technical field [0001] The invention relates to the application field of oxide ceramics, in particular to an electric melting yttrium trioxide ceramic crucible for titanium alloy melting casting used for titanium alloy melting casting and a preparation method thereof. Background technique [0002] Titanium alloy is an important structural metal developed in the 1950s. Titanium alloy is widely used in various fields because of its high strength, good corrosion resistance and high heat resistance. Many countries in the world have recognized the importance of titanium alloy materials, and have successively researched and developed them, and have obtained practical applications, mainly the development of high-temperature titanium alloys for aero-engines and structural titanium alloys for airframes. Corrosion titanium alloys and high-strength titanium alloys have been further developed. They are mainly used for the production of aircraft engine compressor components, followed by the s...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a kind of electric fusion yttrium trioxide ceramic crucible and preparation method thereof for molten casting of titanium alloy, this high-purity oxide ceramic crucible and zirconia / calcium oxide / oxide Compared with titanium alloy molten metal, magnesium has the characteristics of non-sticking, non-wetting, good thermal shock performance and ultra-high service life. The safe use temperature is below 2300 degrees, which effectively avoids contact with titanium alloy metal solution at high temperature. The low life of the crucible caused by the chemical reaction caused by the high activity and the decrease in the purity of the titanium alloy caused by the peeling off after the reaction, etc.