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

High-temperature and strength resistant molybdenum non-crystalline alloy

An amorphous alloy, high-temperature-resistant technology, applied in the field of multi-element molybdenum-based alloys, can solve problems such as high melting temperature, difficulty in amorphous alloys, and increased material preparation costs, and achieve good red hardness, high thermal stability and The effect of intensity

Inactive Publication Date: 2006-05-31
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF0 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high melting temperature of refractory metals and their alloys (greater than 2000 ° C), it is very difficult to prepare amorphous alloys by melt cooling, which also increases the cost of material preparation

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
  • High-temperature and strength resistant molybdenum non-crystalline alloy
  • High-temperature and strength resistant molybdenum non-crystalline alloy
  • High-temperature and strength resistant molybdenum non-crystalline alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Mo 50 Si 35 co 15 Alloy (the nominal composition of the alloy is atomic percentage, at.%, the same below).

[0059] Using commercially available Mo, Si, and Co elemental powders as starting materials, the purity is higher than 99.5% (weight percentage, the same below), and the average particle size is less than 75 m, and the nominal composition is Mo 50 Si 35 co 15 powder mixture. The powder mixture and GCr15 steel balls are filled in a quenching ball mill tank under the atmosphere of high-purity Ar gas (99.99%) according to the weight ratio of balls and materials of 5:1. The closed ball mill jar was installed on a SPEX 8000 high-energy ball mill for grinding. After the powder mixture was mechanically ground for 48 hours, no obvious crystal diffraction peaks were observed in the x-ray diffraction spectrum (XRD, the same below), and a diffraction peak of a typical amorphous structure was formed at a diffraction angle of 30-55°; On the thermal analysis (differentia...

Embodiment 2

[0061] Mo 60 Si 28 co 12 alloy

[0062] Mo 60 Si 28 co 12 The preparation of alloy starting materials and the mechanical alloying process are the same as in Example 1. XRD, SEM, DSC analysis process is identical with embodiment 1. Mo formed by mechanical grinding for 48 hours 60 Si 28 co 12 The XRD spectra and DSC curves of alloy powder samples are shown in figure 1 (b) and figure 2 (b). After the powder mixture was mechanically ground for 48 hours, typical diffuse peaks of the amorphous phase and crystal diffraction peaks of the Mo solid solution were observed in the XRD spectrum; an obvious exotherm caused by crystallization could be observed on the DSC curve of the ball-milled powder reaction, these evidences indicate that mechanical milling forms the alloy as a mixture of crystalline and amorphous phases. Use professional software to perform peak fitting on the XRD spectrum, separate the diffraction peaks of the crystal and amorphous phases from the original ...

Embodiment 3

[0064] Mo 70 Si 21 co 9 alloy

[0065] Mo 70 Si 21 co 9 The preparation of alloy starting materials and the mechanical alloying process are the same as in Example 1. XRD, SEM, DSC analysis process is identical with embodiment 1. Mo formed by mechanical grinding for 48 hours 70 Si 21 co 9 The XRD spectra and DSC curves of alloy powder samples are shown in figure 1 (c) and figure 2 (c). After the powder mixture was mechanically ground for 48 hours, typical diffuse peaks of amorphous characteristics and crystal diffraction peaks of Mo solid solution could be observed in the XRD spectrum; an obvious exothermic reaction caused by crystallization could be observed in the DSC curve of the ball-milled powder , these evidences indicate that mechanical milling forms the alloy as a mixture of crystalline and amorphous phases. The process and principle of performing peak-splitting fitting on the XRD spectrum to estimate the volume fraction of the amorphous phase in the ball ...

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

No PUM Login to View More

Abstract

A type of high strength molybdenum amorphous alloy that can endure high temperature. Ití»s characters are as follows: expression of its nominal composition is either MoaCobSic (aú¢40í½80úÑú¼bú¢5í½45úÑú¼ cú¢5í½40úÑú¼a+b+cú¢100úÑ)or MoaCobSicXd (aú¢40í½80úÑú¼bú¢5í½45úÑú¼cú¢5í½40úÑú¼dú¢0.5í½20úÑú¼ a+b+c+dú¢100úÑ) ,within which the letters a,b,c mean atomic percent while the letter X means at least one of the following elements: CríóMníóFeíóCoíóNiíóCuíóBíóGeíóCíóAlíóMgíóCaíóTiíóScíóYíóLaíó CeíóPríóNdíóWíóHfíóTaíóVíóTiíóZríóNb.This alloy shows us many advantages such as higher Crystallizating temperature, better heat stability, and wide temperature range of super-cooling liquid state and high intensity.

Description

Technical field: [0001] The invention relates to an amorphous alloy (or metallic glass), and in particular provides a class of multi-element molybdenum that can form an amorphous structure, has high strength, high crystallization temperature, strong thermal stability, and a wide supercooled liquid temperature range base alloy. Background technique: [0002] Compared with conventional polycrystalline metal materials, the main structural feature of amorphous alloys (also known as metallic glasses) is that the atomic arrangement has no long-term order and no grain boundaries. Therefore, it has excellent properties such as high strength, corrosion resistance, and isotropy. It has broad application prospects in the fields of automobiles, aircraft, micro-machines, microelectronics, sporting goods, precision instruments, anti-theft equipment, energy conversion, and medical materials. At present, the preparation methods of amorphous alloys mainly include: melt quenching, sputterin...

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): C22C27/04C22C1/04C22C30/00
Inventor 张晓强徐坚
Owner INST OF METAL RESEARCH - CHINESE ACAD OF 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