Preparation method of gradient pore porous high-niobium titanium-aluminum alloy

A titanium-aluminum alloy and gradient hole technology is applied in the field of preparation of gradient hole porous high-niobium-titanium-aluminum alloy to achieve the effects of high yield, simple preparation process and low cost

Inactive Publication Date: 2011-02-09
UNIV OF SCI & TECH BEIJING
View PDF3 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the existing problem of preparing porous high-niobium-titanium-aluminum alloys with gradient pores, the present invention proposes a method for preparing porous

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of gradient pore porous high-niobium titanium-aluminum alloy
  • Preparation method of gradient pore porous high-niobium titanium-aluminum alloy
  • Preparation method of gradient pore porous high-niobium titanium-aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The first step: uniformly mix titanium, aluminum and niobium element powders in proportions of 50% (mass fraction, the same below), 40% and 10% respectively, the particle size of the titanium powder is 50um, and the particle size of the aluminum powder is 50um , the particle size of niobium powder is 12um;

[0026] The second step: 5 parts of mixed titanium aluminum niobium powder and NH 4 HCO 3 and polyethylene glycol were made into 5 sheet blanks, the pressing pressure was 50MPa, and the thickness was 1.5mm, of which NH 4 HCO 3 The contents are 46%, 40%, 31%, 25% and 11%, polyethylene glycol and NH 4 HCO 3 The ratio of 25:1;

[0027] The third step: According to the ratio of the amount of titanium, aluminum and niobium powder, five sheet-shaped blanks are sequentially stacked and regularized, and then rolled for the second time. The pressing pressure is 120MPa to obtain the total billet;

[0028] Step 4: Put the total billet into a vacuum drying oven and heat it...

Embodiment 2

[0031] The first step: uniformly mix titanium, aluminum and niobium element powders according to the ratio of 55%, 35% and 10% respectively, the particle size of titanium powder is 100um, the particle size of aluminum powder is 100um, and the particle size of niobium powder is 12um;

[0032] The second step: 5 parts of mixed titanium aluminum niobium powder and NH 4 HCO 3 and polyethylene glycol were made into 5 sheet blanks, the pressing pressure was 50MPa, and the thickness was 2mm, of which NH 4 HCO 3 The contents were 51%, 41%, 31%, 21%, 11% and 1%, polyethylene glycol and NH 4 HCO 3 The ratio of 25:1;

[0033] The third step: According to the ratio of the amount of titanium, aluminum and niobium powder, the 6 sheet-shaped billets are stacked sequentially and then rolled for the second time. The pressing pressure is 180MPa to obtain the total billet;

[0034] Step 4: Put the total billet into a vacuum drying oven and heat it to 110°C, and keep it warm for 2 hours to ...

Embodiment 3

[0037] The first step: uniformly mix titanium, aluminum and niobium element powders in proportions of 55% (mass fraction, the same below), 35% and 10% respectively, the particle size of the titanium powder is 10um, and the particle size of the aluminum powder is 5um , the particle size of niobium powder is 2um;

[0038] Step 2: Mix 3 parts of titanium, aluminum and niobium powder with NH by compression molding 4 HCO 3 and polyethylene glycol were made into three sheet blanks, the pressing pressure was 50MPa, and the thickness was 2.5mm, of which NH 4 HCO 3 The contents were 51%, 31% and 11%, polyethylene glycol and NH 4 HCO 3 The ratio of 25:1;

[0039]Step 3: According to the ratio of the amount of titanium, aluminum and niobium powder, the three sheet-shaped blanks are stacked in sequence, and then rolled for the second time. The pressing pressure is 200MPa to obtain the total billet;

[0040] Step 4: Put the total billet into a vacuum drying oven and heat it to 120°C,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the field of porous metal materials and particularly relates to a preparation method of a gradient pore porous high-niobium titanium-aluminum alloy. The method comprises the following steps of: mixing pure titanium powder, pure aluminum powder and pure niobium powder and sintering the mixture by a Kerkendill effect reaction pore-forming method and a pore-forming agent physical pore-forming method; adding a plurality of ingredients; compacting the ingredients which contain different pore-forming agents and have different content into single blanks respectively; rolling a plurality of single blanks with different pore-forming agent content into the total blank; and performing a vacuum drying degreasing pore-foaming and high-temperature sintering reaction pore-forming process so as to finally obtain a porous high-niobium titanium-aluminum alloy material with a gradient hole structural characteristic and adjustable porosity. The material has gradient porosity change, optionally-adjustable pore structural characteristic, adjustable stress cross section, light weight, high specific stiffness and high heat insulation performance; simultaneously, the material has high material design flexibility and can be widely applied to the industrial fields of high temperature heat insulation, filtering separation, catalysis and the like.

Description

technical field [0001] The invention relates to a porous intermetallic compound material, and discloses a method for preparing a porous high-niobium-titanium-aluminum alloy with gradient pores. Background technique [0002] Titanium-aluminum intermetallic compounds have properties such as light weight, high strength, corrosion resistance and high-temperature oxidation resistance due to the joint action of interatomic metal bonds and covalent bonds. The niobium-titanium-aluminum intermetallic compound can significantly improve the high-temperature resistance and creep strength of titanium-aluminum materials, and has broad application prospects in high-temperature heat insulation, filtration and catalysis and other industrial fields. Due to the Kerkendill effect, porous high-niobium-titanium-aluminum alloys can be obtained by elemental powder metallurgy. The micron-sized pores not only further improve the modulus and light-weight properties of high-niobium-titanium-aluminum al...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22C1/08C22C14/00
Inventor 王辉吕昭平杨帆林均品贺跃辉陈国良
Owner UNIV OF SCI & TECH BEIJING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap