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Kim, S.-H.; Lee, J.Y.; Ahn, J.-P.; Choi, P.-P. |
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Publication  |
Fabrication of Atom Probe Tomography Specimens from Nanoparticles Using a Fusible Bi-In-Sn Alloy as an Embedding Medium |
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Journal Article |
Pages |
2019 |
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Abstract |
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Corporate Author |
Microscopy and Microanalysis |
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Publisher |
25 |
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2 |
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Summary Language |
438-446 |
Series Editor |
atom probe tomography; fusible alloy; nanoparticles |
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Abbreviated Series Title |
We propose a new method for preparing atom probe tomography specimens from nanoparticles using a fusible bismuth-indium-tin alloy as an embedding medium. Iron nanoparticles synthesized by the sodium borohydride reduction method were chosen as a model system. The as-synthesized iron nanoparticles were embedded within the fusible alloy using focused ion beam milling and ion-milled to needle-shaped atom probe specimens under cryogenic conditions. An atom probe analysis revealed boron atoms in a detected iron nanoparticle, indicating that boron from the sodium borohydride reductant was incorporated into the nanoparticle during its synthesis. |
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Cambridge University Press |
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2019/02/04 |
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1431-9276 |
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NU @ karnesky @ |
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11534 |
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Jiang, C.; Sordelet, D.J.; Gleeson, B. |
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Effects of Pt on the elastic properties of B2 NiAl: A combined first-principles and experimental study |
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Journal Article |
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2006 |
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Acta Materialia |
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54 |
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9 |
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2361-2369 |
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Platinum; Nickel aluminides; Point defects; First-principles electron theory |
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First-principles calculations were performed to investigate the effects of Pt addition on the elastic properties of B2 NiAl. By correlating single-crystal elastic constants with point defect concentrations in the context of the Wagner-Schottky model, a general equation is proposed to calculate elastic properties of ternary B2 NiAl-Pt alloys as a function of alloy composition, in which the defect formation parameters were obtained from first-principles supercell calculations. At constant Al content, the calculations showed that the addition of Pt to B2 NiAl will increase its bulk modulus B but decrease both its shear moduli C' and C44. Results from the model calculations were found to be in good agreement with experimental measurements on polycrystalline samples, as well as direct first-principles calculations on special quasirandom structures. |
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NU @ p-kolli @ |
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9711 |
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Lee, B.C.; Park, J.K. |
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Effect of the addition of Ag on the strengthening of Al3Li phase in Al-Li single crystals |
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Journal Article |
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1998 |
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Acta Materialia |
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46 |
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12 |
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4181-4187 |
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The variation of the critical resolved shear stress as a function of aging condition has been measured in ternary Al-~(1.9-2.0) wt% Li-~0.4 wt% Ag single crystals and has been analyzed using the same version of order-hardening theory as in our previous work in binary single crystals. The result showed that the antiphase boundary energy of the Al3Li lattice on {111} definitively increases from about 0.118 J/m2 in binary crystals to 0.128+/-0.012 J/m2 in ternary crystals, in good agreement with the analysis of the transition behavior from shearing to looping and of the dislocation pair spacings. A strong segregation tendency of Ag into the Al3Li lattice is believed to be responsible for this increment. Our previous result of [gamma]apb (0.118+/-0.006 J/m2) in binary crystals is, although unlikely from the recent suggestion of Nembach, the best value one can obtain from the recent knowledge of order-hardening theory. This is slightly larger than that (about 0.100 J/m2) obtained from the analysis of the transition from shearing to looping and somewhat larger than the result (about 0.085 J/m2) of the first-principles calculation. Three factors are discussed as principal causes of a possibility of an overestimation of [gamma]apb on applying order-hardening theory. |
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NU @ karnesky @ |
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9941 |
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Knipling, Keith E.; Karnesky, Richard A.; Lee, Constance P.; Dunand, David C.; Seidman, David N. |
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Precipitation Evolution in Al-0.1Sc, Al-0.1Zr, and Al-0.1Sc-0.1Zr (at.%) Alloys during Isochronal Aging |
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Journal Article |
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2010 |
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Acta Materialia |
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58 |
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15 |
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5184-5195 |
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Aluminum alloys, Precipitation, Scandium, Zirconium, Atom-probe tomography; Al-Sc-Zr |
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Precipitation strengthening is investigated in binary Al-0.1Sc, Al-0.1Zr, and ternary Al-0.1Sc-0.1Zr (at.%) alloys aged isochronally between 200 and 600 °C. A pronounced synergistic effect is observed when both Sc and Zr are present. Above 325 °C, where peak microhardness (670 MPa) occurs in the binary Al-Sc alloy due to Al[sub:3]Sc (L1[sub:2]) nanometer-scale precipitates, Zr additions result in a secondary increase in strength due to additional precipitation of Zr-enriched outer shells onto these precipitates. The ternary alloy reaches a peak microhardness of 780 MPa at 400 °C, delaying overaging by >100 °C compared with the binary Al-Sc alloy and increasing strength compared with the binary Al-Zr alloy (peak microhardness of 420 MPa at 425–450 °C). Compositions, radii, volume fractions, and number densities of the Al[sub:3](Sc[sub:1-x]Zr[sub:x]) precipitates are measured directly using atom-probe tomography. This information is used to quantify the observed strengthening increments, attributed to dislocation shearing of the Al[sub:3](Sc[sub:1-x]Zr[sub:x]) precipitates. |
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NU @ karnesky @ |
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10705 |
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Lee, Byeong-Joo; Jang, Je-Wook |
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A modified embedded-atom method interatomic potential for the Fe–H system |
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Journal Article |
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2007 |
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Acta Materialia |
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55 |
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20 |
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6779-6788 |
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Modified embedded-atom method; Iron–hydrogen alloys; Atomistic simulation; Molecular dynamics; Lattice defect |
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A modified embedded-atom method (MEAM) interatomic potential for the Fe–H binary system has been developed using previously developed MEAM potentials of Fe and H. The potential parameters were determined by fitting to experimental data on the dilute heat of solution of hydrogen in body-centered cubic (bcc) and face-centered cubic (fcc) Fe, the vacancy–hydrogen binding energy in bcc Fe, and to a first-principles calculation for the lattice parameter and bulk modulus of a hypothetical NaCl-type FeH. The potential accurately reproduces the known physical properties of hydrogen as an interstitial solute element in bcc and fcc Fe. The applicability of the potential to atomistic approaches for investigating interactions between hydrogen atoms and other defects such as vacancies, dislocations and grain boundaries, and also for investigating the effects of hydrogen on various deformation and mechanical behaviors of iron is demonstrated. |
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1359-6454 |
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NU @ karnesky @ |
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11399 |
| Permanent link to this record |
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Y.K. Chen-Wiegart, S. Wang, W.K. Lee, I. McNulty, P.W. Voorhees, D.C. Dunand |
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In situ Imaging of Dealloying during Nanoporous Gold Formation by Transmission X-ray Microscopy |
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Journal Article |
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2013 |
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Acta Materialia |
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61 |
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1118-1125 |
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NU @ michaeljsrawlings @ |
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11454 |
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LeGoues, F. K.; Aaronson, H. I.; Lee, Y. W. |
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Influence of Crystallography Upon Critical Nucleus Shapes and Kinetics of Homogeneous FCC-FCC Nucleation--Part III. The Influence of Elastic Strain-Energy |
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Journal Article |
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1984 |
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Acta Metallurgica |
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32 |
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10 |
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1845-1853 |
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Carnegie Mellon Univ,Dept Met Engn & Mat Sci,Pittsburgh,Pa 15213 |
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Times Cited: 15
Article
English
Cited References Count: 24
Ts010 |
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refbase @ user |
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1338 |
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LeGoues, F. K.; Lee, Y. W.; Aaronson, H. I. |
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Influence of Crystallography Upon Critical Nucleus Shapes and Kinetics of Homogeneous FCC-FCC Nucleation--Part II. The Non-Classical Regime |
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Journal Article |
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1984 |
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Acta Metallurgica |
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32 |
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10 |
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1837-1843 |
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Carnegie Mellon Univ,Dept Met Engn & Mat Sci,Pittsburgh,Pa 15213 |
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Times Cited: 22
Article
English
Cited References Count: 8
Ts010 |
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refbase @ user |
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1340 |
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LeGoues, F. K.; Wright, R. N.; Lee, Y. W.; Aaronson, H. I. |
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Influence of Crystallography Upon Critical Nucleus Shapes and Kinetics of Homogeneous FCC-FCC Nucleation--Part V. The Origin of GP Zones in Al-Ag and Al-Cu Alloys |
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Journal Article |
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1984 |
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Acta Metallurgica |
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32 |
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10 |
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1865-1870 |
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Carnegie Mellon Univ,Dept Met Engn & Mat Sci,Pittsburgh,Pa 15213
Michigan Technol Univ,Dept Met Engn,Houghton,Mi 49931 |
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Times Cited: 9
Article
English
Cited References Count: 15
Ts010 |
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refbase @ user |
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1341 |
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Wang, W. N.; Fox, N. A.; Davis, T. J.; Richardson, D.; Lynch, G. M.; Steeds, J. W.; Lee, J. S. |
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Growth and field emission properties of multiply twinned diamond films with quintuplet wedges |
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Journal Article |
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1996 |
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Applied Physics Letters |
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Appl. Phys. Lett. |
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69 |
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2825-2827 |
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Field Emission |
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no |
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2042 |
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