Home > Press > Scientists from NUST MISIS manage to improve metallic glasses
Metallic glass sample CREDIT NUST MISIS |
Abstract:
Researchers at National University of Science and Technology MISIS (NUST MISIS) have managed to develop a unique method to process bulk metallic glasses. According to the authors of the study, they have managed to find processing conditions that significantly improve the quality of this promising material. The research results were published in Journal of Alloys and Compounds.
Metallic glasses (amorphous metals) are materials which, unlike crystalline forms, don't have a long range atomic order. According to the scientists, this makes the material high-strength, elastic, corrosion resistant; amorphous metals also have other useful properties, due to which they are in demand in instrument making, mechanical engineering, medicine and magneto-electrical engineering.
NUST MISIS scientists explained that the material's brittleness is one of the obstacles to its widespread use. The authors of the study believe that the new method to process metallic glasses will help eliminating this problem. The method was tested on an amorphous Zr-Cu-Fe-Al system alloy.
"Annealing before and after rolling was 'prohibited' by the canons of the science of metallic glasses, since this leads to their embrittlement in the absolute majority of cases. The choice of the alloy composition and alloying system helped us bypass this problem: annealing at about 100 degrees below the glass-transition temperature allowed to achieve ductilization of bulk samples and hardening of tape samples without embrittlement," Professor Dmitry Luzgin, the research supervisor, explained.
According to the scientists, it is the way the original amorphous matrix of the alloy decomposes that affects the resulting material's characteristics. Different results are achieved depending on the samples' geometry, bulk or tape.
"For bulk samples, we've achieved an increase in tensile plasticity of up to 1.5% at room temperature by dividing a homogeneous amorphous phase into two. For ribbon samples, a 25% increase in hardness has been achieved, which is provided with the separation of secondary-amorphous-phase glassy nanoparticles of about 7 nm with retention of plasticity on bending and compression. This is an unexpected and rather significant result," Andrey Bazlov, the author of the method, an employee at the Department of Physical Metallurgy of Non-ferrous Metals of NUST MISIS, said.
NUST MISIS scientists explained that the Zr-Cu-Fe-Al system alloy cannot be used as the main structural material due to its high cost; but they believe that the proposed technology can be applied to other amorphous alloys, in particular, titanium.
The new method will simplify the process of imparting the necessary properties to metallic glasses, thereby expanding their scope of application. In the future, the research team wants to use the new technology to produce titanium and other high-quality bulk metallic glasses.
####
For more information, please click here
Contacts:
Lyudmila Dozhdikova
7-925-043-1990
Copyright © National University of Science and Technology MISIS
If you have a comment, please Contact us.Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
Related Links |
Related News Press |
News and information
Simulating magnetization in a Heisenberg quantum spin chain April 5th, 2024
NRL charters Navy’s quantum inertial navigation path to reduce drift April 5th, 2024
Discovery points path to flash-like memory for storing qubits: Rice find could hasten development of nonvolatile quantum memory April 5th, 2024
Possible Futures
Discovery points path to flash-like memory for storing qubits: Rice find could hasten development of nonvolatile quantum memory April 5th, 2024
With VECSELs towards the quantum internet Fraunhofer: IAF achieves record output power with VECSEL for quantum frequency converters April 5th, 2024
Discoveries
Chemical reactions can scramble quantum information as well as black holes April 5th, 2024
New micromaterial releases nanoparticles that selectively destroy cancer cells April 5th, 2024
Utilizing palladium for addressing contact issues of buried oxide thin film transistors April 5th, 2024
Materials/Metamaterials/Magnetoresistance
Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024
Focused ion beam technology: A single tool for a wide range of applications January 12th, 2024
Announcements
NRL charters Navy’s quantum inertial navigation path to reduce drift April 5th, 2024
Discovery points path to flash-like memory for storing qubits: Rice find could hasten development of nonvolatile quantum memory April 5th, 2024
Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters
Simulating magnetization in a Heisenberg quantum spin chain April 5th, 2024
Discovery points path to flash-like memory for storing qubits: Rice find could hasten development of nonvolatile quantum memory April 5th, 2024
The latest news from around the world, FREE | ||
Premium Products | ||
Only the news you want to read!
Learn More |
||
Full-service, expert consulting
Learn More |
||