Method for improving density of foam titanium

A foamed titanium and dense technology, applied in the field of foamed titanium materials, can solve the problems of increasing the difficulty of melt foaming, reducing ductility, and high melting point of titanium, improving microstructure and mechanical properties, increasing adaptability, and improving density. Effect

CN102876908BInactive Publication Date: 2014-05-14CHONGQING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2014-05-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for improving density of foam titanium. In a process that the foam titanium is prepared by a traditional powder metallurgy blended elemental method, not more than 0.75wt% of rare earth Er2O3 powder is added, and the high-density foam titanium is obtained by means of raw material mixing, compression molding and desorption and vacuum sintering of pore-forming agents. The rare earth Er2O3 of an appropriate quantity is added, and a liquid phase is generated during sintering to improve the density of the materials, so that the quantity of microcosmic pores is effectively decreased to improve the density of the foam titanium, microstructures and mechanical properties of the foam titanium are further improved, and the technical problem unsolved for a long time is solved. The method is simple in technology and high in operability.
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Description

technical field

[0001] The invention relates to the technical field of foamed titanium materials, in particular to a method for increasing the density of foamed titanium. Background technique

[0002] Porous material is a brand-new material system developed in the 20th century, and has become a new type of structural and functional material in the current material field. Compared with dense materials, porous materials have some unique properties due to the existence of pore structure, such as low relative density, high specific strength, large specific surface area, light weight, sound insulation, heat insulation, good permeability, etc., widely Used in aerospace, chemical industry, building materials, metallurgy and other fields. Titanium is a metal with excellent performance. It has the characteristics of high specific strength, light specific gravity, high temperature resistance, corrosion resistance and good biocompatibility. It is widely used in national defense, chemi...

Examples

specific Embodiment

[0021] (1) A method for increasing the density of foamed titanium. In the process of preparing foamed titanium by traditional powder metallurgy mixed element method, adding rare earth Er 2 o 3 powder, rare earth Er 2 o 3 The amount of addition is 0.25 wt% to 0.75 wt%. Specific examples are as follows:

[0022] With HDH titanium powder (purity ≥ 99%, particle size ≤ 50μm) and rare earth Er 2 o 3 Powder (purity≥99.95%, particle size≤10μm) is used as raw material, urea particles (particle size between 700-1000μm) are used as pore-forming agent, and titanium foam is prepared by traditional powder metallurgy mixed element method. The experiment is designed according to the porosity of 70%, the sample size is φ12mm×10 mm, the rare earth Er 2 o 3 The amount of powder added is set to 6 levels: 0, 0.25, 0.50, 0.75, 1.0, 2.0wt%, as shown in Table 1.

[0023] Table 1 Er2O3 content corresponding to different samples

[0024]

[0025] Such as figure 1 As shown, the main proces...