Point defects quenched in NiAl and related intermetallic compounds
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Point defects quenched in NiAl and related intermetallic compounds by Jiawen Fan

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Published .
Written in English

Subjects:

  • Intermetallic compounds -- Defects.,
  • Intermetallic compounds -- Quenching.,
  • Aluminum compounds -- Defects.,
  • Aluminum compounds -- Quenching.,
  • Point defects.

Book details:

Edition Notes

Statementby Jiawen Fan.
The Physical Object
Paginationx, 93 leaves, bound :
Number of Pages93
ID Numbers
Open LibraryOL16905022M

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The B2 type intermetallic compounds consisting of VIII and IIIb component atoms, such as the NiAl and CoAl, exhibit different types of point defects with deviation of alloy composition from the. VACANCY DEFECTS IN THE ORDERED COMPOUND NiAl* A. BALLft and R. E. SMALLMANf Vacancy precipitation effects in the form of small dislocation loops and helical dislocations have been observed in quenched and aged samples of the intermetallic compound by: Point defects in intermetallic compounds, particularly NiAl, have been studied intensively by computer simulations during the last 5 years (Murch and Belo va, ; Korzhavyi et al.   Point defect hardening in binary B2 intermetallic compounds with the anti-structure defect structure (FeCo and AuZn) and the triple defect structure (NiAl, FeAl, and CoAl) was investigated. Thermodynamic modeling combined with experimental measurements of lattice parameters and bulk densities were used to establish point defect concentrations.

constitutional defects, i.e. constitutional vacancies and antisite defects [3]. Defects In B2 Intermetallic Compounds The homogeneity is retained to high temperatures at even large deviations from the stoichiometric composition, the defect formation in intermetallic compounds is . From thermodynamic data on seven CsCl-type intermetallic nonstoichiometric compounds, the nature of the defects present has been deduced and the defect concentrations, and free energies, enthalpies, and entropies of defect formation have been calculated. The compounds discussed include AuCd, AgMg, AuZn, FeAl, NiAl, CoAl, and PdAl. It is shown that the thermodynamic activities across the .   The aim of the present paper is thus to determine the defect structure appearing in the B2 type intermetallic compounds CoAl as a function of composition from the XRD and density measurements. POINT DEFECT BEHAVIOR Vol. 35, No. 7 Experimental and Analysis Procedures Seven alloys ,; ( Defects or Imperfections in crystalline solid can be divided into four groups namely line defects, point defects, volume defects and surface defects. Historically, crystal point defects were first regarded in ionic crystals, not in metal crystals that were much simpler. There are 3 types of point defects: Stoichiometric defect.

Point Defect. Point defects involve a single atom or small cluster of atoms and are, in turn, subdivided into two types: ‘vacancies’, where an atom (or in an ionic substance an atom pair, to conserve charge balance) is missing, and ‘interstitials’, where the extra atom is situated in . Request PDF | On , H.-E. Schaefer and others published Intermetallics: Point Defects | Find, read and cite all the research you need on ResearchGate. H.-E. Schaefer, K. Frenner, and R. Würschum. Time-Differential Length Change Measurements for Thermal Defect Investigations: Intermetallic B2-FeAl and B2-NiAl Compounds, a Case Study. Phys. Rev. Lett. 82, (). ADS CrossRef Google Scholar. Point defect hardening in binary B2 intermetallic compounds with the anti-structure defect structure (FeCo and AuZn) and the triple defect structure (NiAl, FeAl, and CoAl) was investigated.