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61.
62.
E. Vafaei-Makhsoos Edwin L. Thomas Louis E. Toth 《Metallurgical and Materials Transactions A》1978,9(10):1449-1460
Electron microscopy has been used to study the structure of Ni-P electrodeposited thin films with 7, 12, 20 and 22 at. pct
P. For the crystalline as-deposited films with 7 and 12 at. pct P (low P films), the crystal structure is fcc and the grains
are a supersaturated solid solution of P in Ni. Grain size decreases with increasing P content; the present findings agree
with previous ones. For “amorphous” as-deposited films with 20 and 22 at. pet P (high P content films) the amorphous phase
is not completely homogeneous and there are regions in which small microcrystals exist. Electron beam heating a low P con-tent
film causes the crystalline array of supersaturated Ni grains to decompose to an equilibrium mixture of Ni and Ni3P; both types of grains are randomly oriented. Electron beam heating a high P content film causes the amorphous regions to
undergo several complex transformations. The first reaction to occur is: Amorphous (Ni-P) -NixPy + Ni (random) where NixPy is a newly discovered phase with a variable composition. Further beam heating causes a second transformation to equilibrium
phases: NixPy + Ni → Ni3P + Ni (random). The microstructure resulting from the above transformations depends on variations in composition of the as-deposited
specimens, rates of heating and temperature gradients. The mode of phase transformation in microcrystalline regions and amorphous
regions is distinctly different. Crystallization in amorphous regions occurs by a nucleation and growth of NixPy, and Ni; a crystallization front is seen to advance into the amorphous re-gion. Crystallization in microcrystalline regions
occurs by nucleation and growth of the Ni3P phase and grain coarsening of the Ni phase. No distinct crystallization front is ob-served. 相似文献
63.
64.
65.
The FORTRAN implementation of an efficient algorithm which solves the 0–1 single knapsack problem is given. Computational results are presented, showing the proposed method to be generally superior to the best known algorithms. 相似文献
66.
Li Yanhui Xu Tongtong Wang Shuzhong Yang Jie Fekete Balazs Yang Jianqiao Wu Angjian Qiu Jie Xu Yi Macdonald Digby D. 《Oxidation of Metals》2019,92(1-2):27-48
Oxidation of Metals - For 9–12Cr ferritic–martensitic steels in supercritical water, the dependencies of the thicknesses of three oxide layers (diffusion, inner, and outer layers) on... 相似文献
67.
The formation of a monolithic part during diffusion bonding is accompanied by the diffusion of atoms across the bonding planes. At sufficient low roughness, it mainly depends on the temperature and dwell time. At the same time, the diffusion process competes against grain growth. By adjusting an appropriate level of bearing pressure, it is possible to control deformation taking into account additional parameters resulting from mechanical microstructures and the design and aspect ratio of the part. Furthermore, material properties, such as the content of alloying elements, the degree of cold work hardening and the grain size, have an impact on diffusion and deformation behavior. Also the surface condition of mating surfaces is important to diffusion kinetics and the quality of the joint. Especially passivation layers of corrosion‐resistant alloys, such as stainless steels and nickel‐based alloys, impair diffusion. In contrast to this, cold work hardening at low depth below the surface, e. g. by means of a blasting processes, may facilitate formation of a good bond and help to limit grain size. For oxide dispersion‐strengthened materials, additional impacts on diffusion bonding behavior applies. 相似文献
68.
Hammer DX Noojin GD Thomas RJ Clary CE Rockwell BA Toth CA Roach WP 《Applied optics》1997,36(7):1684-1693
A fiber probe has been designed as a surgical aid to cut intraocular membranes with laser-induced breakdown as the mechanism. The design of the intraocular laser surgical probe is discussed. A preliminary retinal damage distance has been calculated with breakdown threshold, spot size, and shielding measurements. Collateral mechanical-damage effects caused by shock wave and cavitation are discussed. 相似文献
69.
Single‐Photon Emission: Bright Room‐Temperature Single‐Photon Emission from Defects in Gallium Nitride (Adv. Mater. 12/2017) 下载免费PDF全文
70.
Synthesis,Characterization and Immunological Evaluation of Self‐Adjuvanting Group A Streptococcal Vaccine Candidates Bearing Various Lipidic Adjuvanting Moieties 下载免费PDF全文
Dr. Vincent Fagan Dr. Waleed M. Hussein Mei Su Ashwini K. Giddam Dr. Michael R. Batzloff Prof. Michael F. Good Prof. Istvan Toth Dr. Pavla Simerska 《Chembiochem : a European journal of chemical biology》2017,18(6):545-553
Four group A streptococcal glycolipopeptide vaccine candidates with different lipidic adjuvanting moieties were prepared and characterized. The immunogenicity of the compounds was evaluated by macrophage and dendritic cell uptake studies and by in vivo quantification of systemic IgG antibody by ELISA. Three of the candidates showed significant induction of the IgG response. 相似文献