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Preparation method of nano porous titanium alloy film

A nano-porous, titanium alloy technology, applied in the field of porous titanium alloy membrane preparation, to achieve the effects of eliminating stress, improving the uniformity of pore distribution, and reducing filtration resistance

Active Publication Date: 2021-02-09
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods are difficult to prepare porous titanium alloy foil with a thickness of less than 0.02mm

Method used

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  • Preparation method of nano porous titanium alloy film
  • Preparation method of nano porous titanium alloy film
  • Preparation method of nano porous titanium alloy film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment includes the following steps:

[0039] Step 1. Put the Ti-6Al-4V titanium alloy foil with a thickness of 20 μm in a vacuum of 10 -2 Pa~10 -3 Vacuum heat treatment was carried out for 60 minutes under the condition of Pa and temperature of 980°C; the Ti-6Al-4V titanium alloy foil was prepared by smelting and rolling method

[0040] Step 2. Carry out surface pickling and purification to the Ti-6Al-4V titanium alloy foil after vacuum heat treatment in step 1; the process of said surface pickling and purification is: heat treated Ti-6Al-4V The titanium alloy foil was immersed in the mixed acid solution for cleaning for 5 seconds, then placed in deionized water, acetone and absolute ethanol for ultrasonic cleaning for 60 minutes, and then purified under a nitrogen atmosphere of 0.6 Pa for 60 minutes after removal; the mixed acid solution was prepared by HF solution with a mass concentration of 38%, HNO with a mass concentration of 65% 3 The solution and wa...

Embodiment 2

[0048] This embodiment includes the following steps:

[0049] Step 1. Put the Ti-6Al-7Nb titanium alloy foil with a thickness of 200 μm in a vacuum of 10 -2 Pa~10 -3 Pa, the temperature is 700 ℃ under the conditions of vacuum heat treatment for 240min;

[0050] Step 2. Carry out surface pickling and purification to the Ti-6Al-7Nb titanium alloy foil after vacuum heat treatment in step 1; the process of said surface pickling and purification is: heat treated Ti-6Al-7Nb The titanium alloy foil was immersed in the mixed acid solution for cleaning for 5 seconds, and then placed in deionized water, acetone and absolute ethanol for ultrasonic cleaning for 60 minutes respectively. After taking it out, it was purified under a nitrogen atmosphere of 1.0 Pa for 40 minutes; the mixed acid solution was prepared by HF solution with a mass concentration of 38%, HNO with a mass concentration of 65% 3 The solution and water are mixed according to the volume ratio of 1:5:4, and the temperat...

Embodiment 3

[0058] This embodiment includes the following steps:

[0059] Step 1. Put the Ti-3Al-2.5V titanium alloy foil with a thickness of 60 μm in a vacuum of 10 -2 Pa~10 -3 Pa, the temperature is 1000 ℃ under the conditions of vacuum heat treatment for 100min;

[0060] Step 2. Carry out surface pickling and purification to the Ti-3Al-2.5V titanium alloy foil material after vacuum heat treatment in step 1; the process of said surface pickling and purification is: heat treated Ti-3Al- The 2.5V foil was immersed in the mixed acid solution for cleaning for 5 seconds, then placed in deionized water, acetone and absolute ethanol for ultrasonic cleaning for 60 minutes, and then purified under a nitrogen atmosphere of 0.8 Pa for 20 minutes after removal; the mixed acid solution was prepared by HF solution with a mass concentration of 38%, HNO with a mass concentration of 65% 3 The solution and water are mixed according to the volume ratio of 1:5:4, and the temperature of the mixed acid so...

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Abstract

The invention discloses a preparation method of a nano porous titanium alloy film. The method comprises the steps that firstly, vacuum heat treatment is carried out on aluminum-containing titanium alloy foil; secondly, surface pickling and purification are carried out in sequence; thirdly, electrochemical dealloying treatment is carried out, and a porous titanium alloy film crude product is obtained through cleaning and drying; and fourthly, vacuum heat treatment is carried out so as to achieve hole expanding, and the nano porous titanium alloy film is obtained. According to the method, through the difference of electrochemical potentials of aluminum and titanium in an alkaline solution, the aluminum element in the aluminum-containing titanium alloy foil is selectively dissolved through electrochemical dealloying treatment, and therefore straight-through pores are formed in the original position of dissolved and removed aluminum, the sizes and depths of the pores are controlled by combining a heat treatment hole expanding process, and the nano porous titanium alloy film with uniform pore distribution and uniform pore diameters is obtained; and the high-precision application requirements in the fields of micro-flow control, filtration separation, gas sensors, electrodes of supercapacitors, high-catalytic-activity systems, biomedical implant materials and the like are met.

Description

technical field [0001] The invention belongs to the technical field of preparation of porous titanium alloy membranes, and in particular relates to a preparation method of nanometer porous titanium alloy membranes. Background technique [0002] Metal porous titanium alloy foil (membrane) not only has the characteristics of metal, but also has the functional characteristics of porous materials. Fuel cells and current collectors of SPE electrolyzed water devices), biomedical implant materials and other fields have great potential application value. [0003] At present, the preparation methods of porous titanium alloy foil (membrane) mainly include loose packing sintering method, powder rolling method and isostatic pressing method. Among them, the powder rolling method can produce porous titanium alloy plates of 0.2mm to 4mm, and serious cracking will occur when rolling porous titanium alloy foils with a thickness of less than 0.2mm; the pores of porous titanium alloy plates p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18C22F1/02C25F3/04
CPCC22F1/183C22F1/02C25F3/04
Inventor 李亚宁李广忠
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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