Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of w-ta-mo-nb-hf-c high-temperature high-entropy alloy and its preparation method

A w-ta-mo-nb-hf-c, high-entropy alloy technology, applied in the field of metal materials

Active Publication Date: 2021-08-20
NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI +1
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially alloys with high strength at 1800°C have not been reported

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
  • A kind of w-ta-mo-nb-hf-c high-temperature high-entropy alloy and its preparation method
  • A kind of w-ta-mo-nb-hf-c high-temperature high-entropy alloy and its preparation method
  • A kind of w-ta-mo-nb-hf-c high-temperature high-entropy alloy and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1 Preparation of WTaMoNbHfC high temperature high entropy alloy

[0043] The raw materials used are W elemental powder, Ta elemental powder, Mo elemental particles, Nb elemental particles, HfC carbide powder, and W, Ta, Mo, Nb, Hf, and C elements are prepared in equal atomic ratios. Put the above raw materials into the water-cooled copper crucible of the non-consumable vacuum arc melting furnace, and then carry out vacuum arc melting: the vacuum chamber is evacuated to 5 × 10 -3 Pa, and then filled with 99.999% pure high-purity argon until the vacuum chamber pressure is -0.7MPa, high-purity argon is used as protective gas and arc medium, the melting current is 450A, and cooling water is passed during melting to prevent the water-cooled copper plate from overheating and melting , the front and back sides are repeatedly smelted 5 times, each smelting 4 minutes, the alloy is in the liquid state for 20 minutes, and the WTaMoNbHfC high-temperature high-entropy alloy ...

Embodiment 2

[0044] Example 2 Performance test and structural characterization of WTaMoNbHfC high-temperature high-entropy alloy ingot

[0045] 1. Density determination:

[0046] The Archimedes drainage method was used to measure, and the specific operation steps were as follows: The WTaMoNbHfC high-temperature high-entropy alloy prepared in Example 1 was prepared into three cylindrical samples of Φ4mm×4mm, and placed in a beaker filled with anhydrous alcohol before measurement. In the middle, ultrasonic vibration cleaning for 10min, take out and dry, and then use a DT-100 precision balance (accuracy 0.1mg) to weigh the dry weight of each sample M 1 , each sample is weighed 3 times to reduce the measurement error; then, the mass M of each sample in water is weighed again 2 , each sample is weighed 3 times; finally, the density is calculated according to the following formula,

[0047]

[0048] In the formula, ρ 0 is the density of water, 0.9982g / cm 3 (20°C); ρ l is air density, 0.0...

Embodiment 3W16

[0062] Example 3W 16 Ta 16 Mo 17 Nb 17 hf 17 C 17 Preparation, Performance Testing and Structural Characterization of High-Temperature High-Entropy Alloys

[0063] The raw materials used are W elemental powder, Ta elemental powder, Mo elemental particles, Nb elemental particles, HfC carbide powder, and according to W:Ta:Mo:Nb:Hf:C=16:16:17:17:17:17 Atomic ratio ingredients. Put the above raw materials into the water-cooled copper crucible of the non-consumable vacuum arc melting furnace, and then carry out vacuum arc melting: the vacuum chamber is evacuated to 5 × 10 -3 Pa, and then filled with 99.999% pure high-purity argon until the vacuum chamber pressure is -0.7MPa, high-purity argon is used as protective gas and arc medium, the melting current is 380A, and cooling water is passed during melting to prevent the water-cooled copper plate from overheating and melting , the front and back sides are repeatedly smelted 4 times, each smelting for 4 minutes, the alloy is in...

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
compressive strengthaaaaaaaaaa
compressive strengthaaaaaaaaaa
microhardnessaaaaaaaaaa
Login to View More

Abstract

The invention provides a W-Ta-Mo-Nb-Hf-C high-temperature high-entropy alloy and a preparation method thereof. The high-temperature high-entropy alloy is composed of W, Ta, Mo, Nb, Hf and C in equal or non-equidomic ratios. The present invention also provides a preparation method of the high-temperature high-entropy alloy, comprising: 1) weighing W, Ta, Mo, Nb, Hf and C raw materials of required weight; 2) performing vacuum arc melting. The W-Ta-Mo-Nb-Hf-C high-temperature high-entropy alloy prepared by the present invention still has a strength of 266 MPa at 1800 ° C, which can be used to make up for the insufficient strength of the nickel-based superalloy at a temperature above 1200 ° C, and replace the nickel-based superalloy for high temperature structural field.

Description

technical field [0001] The invention belongs to the field of metal materials, relates to a high-temperature-resistant high-entropy alloy and a preparation method thereof, in particular to a W-Ta-Mo-Nb-Hf-C high-temperature high-entropy alloy and a preparation method thereof. Background technique [0002] Near-space hypersonic vehicles have many advantages such as high speed, high maneuverability, and long-range precision strikes, representing the development direction of aerospace vehicles. The exploration of new high-temperature structural materials resistant to extreme environments has become an urgent need for the development of hypersonic vehicles and aerospace technology. At present, ultra-high temperature environment materials generally use ultra-high temperature ceramics. However, the fracture toughness of the ultra-high temperature ceramic bulk material is low, and its thermal shock resistance is greatly affected by the size, which is the main reason restricting its...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/02C22C1/03C22C32/00
CPCC22C1/02C22C1/03C22C30/00C22C32/0052
Inventor 梁秀兵万义兴张志彬胡振峰莫金勇沈宝龙
Owner NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com