| Records |
Title  |
Liu W Ren D M Zhong H M Ye S X Zhou,; F M Wuhon, |
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A study of adsorption of CO on Rh surfaces with AP FIM |
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Journal Article |
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1989 |
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J. University (China) |
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10(9188) |
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4687 |
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Audiffren, M.; Traimon, P.; Bardon, J.; Drechsler, M. |
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A study of atom zigzag chains on the surface of tungsten |
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Journal Article |
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1978 |
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Surface Science |
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Surf. Sci. |
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75 |
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4 |
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751-760 |
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surface structure; Field Ion Microscopy |
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Nishigaki and Nakamura have observed zigzag chains on the central (011) face of tungsten after field evaporation at T #62; 140 K. In this paper, a study of the formation, disappearance and structure of such chains is described. Tungsten tips of small radii down to 60 Ã… were used. Chains of 3 to 9 spots, that are clearly visible, are found even at 90 K. Four different structure models of the zigzag chains are discussed, including the multibranch model proposed by the Japanese authors. The interpretation of our experimental results shows fairly clearly that the real zigzag chain structure is a special non-dense structure. It must be formed by a local displacement of the tungsten adatoms in the field. Without the field, a zigzag chain is transformed into a two-dimensional cluster of the nearest neighbour atom by a small increase in temperature. If the field is reintroduced, the cluster can revert to the initial zigzag structure. The zigzag structure is interpreted as being caused by forces of repulsion between the atom dipoles. |
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8848 |
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Ren, D. G. |
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A study of atomic distribution in the intermetallic compound by AP-FIM |
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Journal Article |
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1993 |
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Proc. 1st Meeting of the Pacific Rim International Conf. on Advanced Material Processes, C. Shi, H. Li, S. Hengde and S. Alexander, eds., Miner. Metals and Mater. Society, Warrendale, PA (1992) 367-72 |
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5459 |
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Ren, D. G.; Liu, W. |
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A study of chemisorption behavior of carbon monoxide on rhodium surfaces |
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Journal Article |
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1990 |
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Surface Science |
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Surf. Sci. |
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232 |
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Atom Probe Field Ion Microscopy |
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4304 |
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Bowkett, K. M.; Hren, J.; Ralph, B. |
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A study of neutron damage with the field ion microscope |
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Book Chapter |
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1964 |
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Proc. 3rd European Conf. on Electron Microscopy |
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neutron irradiation; Field Ion Microscopy |
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5751 |
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Prosa, T.J.; Strennen, S.; Olson, D.; Lawrence, D.; Larson, D.J. |
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A Study of Parameters Affecting Atom Probe Tomography Specimen Survivability |
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Journal Article |
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2019 |
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Microscopy and Microanalysis |
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25 |
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2 |
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425-437 |
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analysis yield; experimental design; electric field; tensile stress; silicon-based materials |
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Specimen survivability is a primary concern to those who utilize atom probe tomography (APT) for materials analysis. The state-of-the-art in understanding survivability might best be described as common-sense application of basic physics principles to describe failure mechanisms. For example, APT samples are placed under near-failure mechanical-stress conditions, so reduction in the force required to initiate field evaporation must provide for higher survivability--a common sense explanation of survivability. However, the interplay of various analytical conditions (or instrumentation) and how they influence survivability (e.g., decreasing the applied evaporation field improves survivability), and which factors have more impact than others has not been studied. In this paper, we report on the systematic analysis of a material composed of a silicon-dioxide layer surrounded on two sides by silicon. In total, 261 specimens were fabricated and analyzed under a variety of conditions to correlate statistically significant survivability trends with analysis conditions and other specimen characteristics. The primary result suggests that, while applied field/force plays an obvious role in survivability for this material, the applied field alone does not predict survivability trends for silicon/silicon-dioxide interfaces. The rate at which ions are extracted from the specimen (both in terms of ions-per-pulse and pulse-frequency) has similar importance. |
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Cambridge University Press |
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2018/11/05 |
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1431-9276 |
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NU @ karnesky @ |
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11541 |
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Wang, Q.; Kinkus, T. J.; Ren, D. G. |
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A study of the process of field evaporation as Markov chains |
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Journal Article |
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1988 |
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Surface Science |
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Surf. Sci. |
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197 |
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4226 |
| Permanent link to this record |
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Miller, M. K.; Burke, M. G.; Brenner, S. S.; Soffa, W. A. |
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A TEM/FIM study of modulated microstructures in the iron-beryllium system |
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Journal Article |
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1984 |
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Anal. Electron Microsc., Proc. Workshop, D. B. Williams and D. C. Joy, eds., San Francisco Press, San Francisco, CA (1984) 182-184 |
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FeBe modulations FIM TEM |
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8623 |
| Permanent link to this record |
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Ismail, I. M.; Barat, M.; Brenot, J. C.; Fayeton, J. A.; Lepere, V.; Picard, Y. J. |
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A zero dead-time, multihit, time and position sensitive detector based on micro-channel plates |
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Journal Article |
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2005 |
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Review of Scientific Instruments |
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Rev. Sci. Instrum. |
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76 |
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9373 |
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Wang, Ren-Nian; Tang, Bi-Yu; Peng, Li-Ming; Ding, Wen-Jing |
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Ab initio study of the effect of Zr content on elastic and electronic properties of L12-Al3(Sc1-xZrx) alloys |
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Journal Article |
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2012 |
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Computational Materials Science |
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59 |
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87-93 |
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Special quasi-random structure; Stability; Elastic properties; Electronic structures; Ab initio calculation |
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First-principles calculations were performed to investigate the structural, elastic and electronic properties of L12-Al3(Sc1-xZrx) (x = 0.25, 0.5 and 0.75) based on special quasi-random structures (SQSs) with 32 atoms. As the content of Zr atoms increased, the lattice parameters of L12-Al3(Sc1-xZrx) were increased whereas thermodynamical stability was lowered. The obtained C11 and C44 were reduced slightly, indicating that the incompressibility along the principle axes and the resistance to shear in 0 0 1 direction on the {1 0 0} plane were lowered, the shear and Young's modulus were also reduced while the bulk modulus were slightly larger. The ductility was improved due to increase of the B/G ratio and Cauchy pressure. The electronic structures revealed that the dominant hybridization between the Al p states and transition-metal d states became weaker with increasing of the content of Zr. |
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0927-0256 |
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NU @ karnesky @ |
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11367 |
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