High-temperature ordered intermetallic alloys

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WebAug 24, 2003 · We have discovered high ductilities in twelve fully ordered, completely stoichiometric RM intermetallic compounds (where R = a rare earth and M = a main group or transition metal). These RM... WebFeb 13, 1998 · It has been found that alloys such as Ti-45AI-IONb (at.%) and Ti45A1-SNb have 1.25% flow stress values in compression of > 800 MPa at room temperature and > 500 MPa at 1173 K. When compared with values from a more conventional alloy, Ti-47A1-2Cr-0.2Si, they represent a considerable increase in strength.

Tensile and Creep Behavior of Ordered Orthorhombic Ti2A1Nb-Based Alloys …

WebHigh Temperature Creep of Nb-Al-V Alloys Elastic Constants and Coefficients of Thermal Expansion of Laves Phase Cr2X (X=Hf, Nb, Ta, Zr) Alloys The Effects of Nanostructure on the Strengthening of NiAl Continuous Solid Solution of κ-Phase in the Third Period Transition Metals-Aluminum-Carbon Pseudo-Ternary System WebApr 14, 2024 · Nowadays, the vast majority of high-temperature components are based on nickel alloys, due to their high durability and standardized technology. Nevertheless, further improvements, such as structure or surface modification or industrialization of 3D printing, are mandatory to meet the requirements of the continuously expanding thermal barrier ... hijaz railway station

A family of ductile intermetallic compounds Nature Materials

WebJan 19, 2024 · In the studied alloys, the values of δ vary from 6.26% to 4.81% while the values of Ω are between 1.43 and 2.34. As predicted by the criteria of Ω > 1.1 and δ < 6.6% in HEAs, the alloys should ... WebNeeds for improved high-temperature structural materials are widespread, with much current attention to jet engines. Although ... subjected to high stresses and elevated temperatures are multiphase alloys where the strengthening phase is an intermetallic compound; ... the ordered intermetallic -NAI compound Ni3A1 [data a. from (2)] … WebMay 15, 1990 · Intermetallic compounds which are ductile at high temperatures are of great technological interest; however, purely experimental searches for improved intermetallic … small unit leader army

Development of Platinum-Group-Metal Superalloys for High-Temperature …

High temperature ordered intermetallic alloys ix volume …

WebSep 15, 2024 · In order to promote the transformation of alloys into intermetallic compounds, high temperature thermal treatment is usually required, followed by annealing under the protection of inert gases to maintain the ordered structure among the multi-metals and overcome the kinetic barrier of noble metal atom migration from particle interior to … WebUnlike most alloys, IC-221M increases in strength from room temperature up to 800 °C. The alloy is very resistant to heat and corrosion, and finds use in heat-treating furnaces and other applications where its longer lifespan and reduced corrosion give it an advantage over stainless steel. [14] small unit leader tool loginWebHigh-temperature ordered intermetallic alloys IV; Proceedings of the 4th MRS Symposium, Boston, MA, Nov. 27-30, 1990. L. Johnson, D. Pope, J. Stiegler. Published 1991. Materials … hijazin munther neurology

"WebIntermetallic compounds with high melting temperatures are candidates for this application, but the obstacle of their limited ductility must first be overcome. Because the available … " - High-temperature ordered intermetallic alloys

High-temperature ordered intermetallic alloys

Thermal Expansion of a Multiphase Intermetallic Ti-Al-Nb-Mo Alloy …

WebHigh-temperature structural materials e.g. nickel aluminide, Ni 3 Al Dental amalgams, which are alloys of intermetallics Ag 3 Sn and Cu 3 Sn Gate contact / barrier layer for … WebJan 31, 2011 · Superalloys based on platinum-group metals are being developed for high-temperature applications. These alloys have two-phase structures comprising either ordered precipitates in a matrix analogous to the nickel-based superalloys or a fine dispersion of oxide particles in a matrix analogous to oxide-dispersion-strengthened …

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WebJun 5, 2014 · High-Temperature Ordered Intermetallic Alloys IX: Volume 646 (MRS Proceedings) 1st Edition by Joachim H. Schneibel (Editor), …

WebApr 15, 2024 · γ-Titanium Aluminides (γ-TiAl) are intermetallic compounds extensively studied in recent years. This interest is due to their remarkable mechanical and thermophysical properties at high temperatures, such as high strength and stiffness, low coefficient of thermal expansion, high thermal conductivity, and high corrosion and … WebDec 10, 2024 · Accordingly, we realize the synthesis of highly ordered intermetallic catalysts by adopting a separate annealing protocol with a high-temperature alloying stage and a low-temperature ordering ...

WebMay 15, 1990 · Intermetallic compounds which are ductile at high temperatures are of great technological interest; however, purely experimental searches for improved intermetallic materials are time consuming and expensive. Theoretical studies can shorten the experimental search by focusing on compounds with the desired properties. While current … WebFeb 4, 2024 · Intermetallic γ-TiAl-based alloys are lightweight materials for high-temperature applications, e.g., in the aerospace and automotive industries. They can …

Webhigh-temperature ordered intermetallic alloys-vi part ii section ix: ni3ai—dislocations and atomic structure ... high temperature corrosion behavior of ni3al-based alloys 975 h. li, j.t. guo, w.h. lai, s.h. wang, and m.h. tan the effect of nitrogen on the oxidation of tial 981

WebDec 31, 1997 · The present conference on high-temperature ordered intermetallic alloys discusses alloy theory and phase stability, defects and microstructures, mechanical … hiji investment companyWebSep 28, 2001 · Intermetallic compounds TiAl Physical properties Introduction Intermetallic compounds are attractive for a broad range of high temperature structural applications due to their high melting points, high strengths and good oxidation and creep resistances [1]. hijaz railway station alulaWebNov 29, 2013 · Since Ni 3 Al melts at 1395°C and Ni at 1453°C, it is clear that significantly higher operating temperatures, with the attendant improvements in efficiency and thrust-to-weight ratio, can only be attained by the development of an entirely new materials system. hijg florianopolisWebJan 1, 2024 · As a unique type of alloys, intermetallic materials with ordered superlattice structures have drawn tremendous attention in a broad range of modern industries due to their many unique structures and properties, including long-range ordering, strong atomic bonding, site-isolation effect, high strength, high melting points, good corrosion, and … hijda making factoryWebJan 1, 2024 · Potentials of intermetallics for high temperatures were realized in the early 1900s. But initial attempts from time to time failed due to inadequate ductility as well as … small unit for hallwayWebAug 1, 2000 · Subsequent research identified NiAl as an ordered intermetallic material which revealed several attractive properties including low density (∼6 g / cm 3), high melting point (1911 K) and excellent oxidation resistance … hiji high-tech co. ltdWebApr 10, 2024 · This study produced a non-standard alloy of 85% Mg, 13.5% Al, and 1.5% Si by weight. In-depth microstructural, chemical, and morphological analyses of the secondary β phases formed in the MgAlSi alloy were conducted. The formation processes of the intermetallic phases were also examined. Image processing was applied to the obtained … small unit leadership