Xem 1-20 trên 223 kết quả Materials science research
  • In this Eighth Edition we have retained the objectives and approaches for teaching materials science and engineering that were presented in previous editions. The first, and primary, objective is to present the basic fundamentals on a level appropriate for university/college students who have completed their freshmen calculus, chemistry, and physics courses.

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  • The aim of this book is to provide an overview on the importance of stoichiometry in the materials science field. It presents a collection of selected research articles and reviews providing up-to-date information related to stoichiometry at various levels. Being materials science an interdisciplinary area, the book has been divided in multiple sections, each for a specific field of applications. The first two sections introduce the role of stoichiometry in nanotechnology and defect chemistry, providing examples of state-of-the-art technologies. ...

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  • Performing experiments in low Earth orbit has been the focus of much of the research funded by NASA’s Physical Sciences Division (PSD) and its predecessors for over 30 years. This microgravity research can be divided into five broad areas, all of which focus primarily on phenomena that are strongly perturbed by gravity: biotechnology, combustion, fluid physics, fundamental physics, and materials science.

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  • Along the way to becoming a space-faring species, humanity has faced enormous challenges. Despite these many initial hurdles, however, the United States has contributed to the progress of human spaceflight by delivering the lunar landings, the space shuttle, and, in partnership with other nations, the International Space Station (ISS). NASA’s rich and successful history has been enabled by, and responsible for, a strong backbone of scientific and engineering research accomplishments.

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  • Nanowires can be defined as structures with thicknesses or diameters of tens of nanometers or less and unconstrained lengths. Many different types of nanowires exist, including metallic (e.g., Ni, Pt, Au or different alloys based on metals), semiconducting (e.g., Si, InP, GaN, etc.), insulating (e.g., SiO2, TiO2), and molecular nanowires (e.g. organic DNA or inorganic). Nanowires have many interesting properties that are not seen in bulk or 3-D materials.

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  • NASA's nanotechnology attempt started in 1996 and it resulted in the founding of the Centre for Nanotechnology. Apart from this centre, the research has been focused on the experimental research and development in computational nanoelectronics and computational optoelectronics.

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  • There are two basic approaches of synthesizing nanowires: top-down and bottom-up pproach. In a top-down approach a large piece of material is cut down to small pieces hrough different means such as lithography and electrophoresis. In a bottom-up approach he nanowire is synthesized by the combination of constituent ad-atoms. Most of the ynthesis techniques nowadays are based on bottom-up approaches.

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  • Muterials science emerged in USA, some time in thc carly 1950s. That phrase denoted a new scientific concept, born out of metallurgy, and this book is devoted to the emergence, development and consequences of that concept, in the US and elsewhere. Just who first coined the phrase is not known, but it is clear that by 1956 a number of senior research scientists had acquired the habit of using it.

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  • Whatever the context, be it solid, liquid, or some transitionary setting, materials science seeks an understanding of a material's macromolecular structure and properties by drawing on knowledge of its atomic and molecular constituents. Until recently, the term ''materials science'' was used primarily to denote empirical study, fundamental research, synthesis, a

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  • Properties of materials, classes of materials used in medicine,... As the main contents of the document "Part 1: Material Science & Engineering". Invite you to consult the text book for more documents serving the academic needs and research.

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  • While selecting the coating material, we encounter a barrier caused by the fact that numerous properties expected from an ideal coating are impossible to be obtained simultaneously. For example, an increase in hardness and strength causes the reduction of the coating’s ductility and adherence to the substrate.

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  • Lieber, P. Yang, and Z.L. Wang in USA by the end of 90’s, successful demonstration of such a large variety of functional devices has lead to a rapidly growing interest in nanowire researches around the world and to a steep increase in the number of annual publications (the ISI-Thomson ‘Web of Science’ database reports over 800 papers published in the year 2009 under the combined keywords ‘nanowires & semiconductors’).

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  • The known dependency between the hardness and abrasion resistance became the foundation for the development of harder and harder coating materials. The progress in the field of producing coatings in the physical vapour deposition process enables the obtainment of coatings of nanocrystal structure presenting high mechanical and usable properties.

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  • Nanocrystals have been attracting much attention for future science and technology. Chapters are sought that address innovative solutions to the design, synthesis, crystallization, morphology control, self-assembly, nano/micro-structure formation, patterning, novel property and device application of Nanocrystals. The book involves Nanocrystals of metal oxides, semiconductors, compounds, noble metals, metals, inorganic materials, carbon materials, organic molecules, polymers, bio materials, hybrid materials, composites, etc....

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  • The field of simulation is broad and multidisciplinary and has had an impressive growth since the 90’s. While the area of simulation has been expanding to new horizons in traditional systems research, there are yet a series of unsolved epistemological issues David et al. (2010).

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  • On the other hand, the social sciences face challenges that go beyond their capabilities of processing information. By using modern techniques such as computer agents and other methodologies, it is possible to aid in the testing and the formulation of theories Davidsson (2002).

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  • These unique characteristics plus the functionalities from the materials themselves impart nanofibers with a number of novel properties for applications in areas as various as biomedical engineering, wound healing, drug delivery and release control, catalyst and enzyme carriers, filtration, environment protection, composite reinforcement, sensors, optics, energy harvest and storage, and many others. More and more emphasis has recently been placed on large-scale nanofiber production, the key technology to the wide usages of nanofibers in practice....

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  • Carbon nanotubes (CNTs), discovered in 1991, have been a subject of intensive research for a wide range of applications. Carbon nanotubes have emerged as the main target of many researchers around the world in pursue to the next nanoscale device. CNTs are one-dimensional (1D) graphene sheets rolled into a tubular form and due to their exceptional electrical and mechanical properties, the possible application in a wide spectrum of electron devices is certainly the focus of future research generations....

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  • This book provides excellent review on the techniques for fabrication aimed to specific applications for current technology. A tremendous amount of work is presented on different modeling and simulation based on the applied semiconductor physics of carbon nanotubes. In the past decades, although carbon nanotubes have undergone massive research, considering the success of silicon, it has, nonetheless, been difficult to appreciate the potential influence of carbon nanotubes in current technology....

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  • The application of the nanostructure coatings is seen as the solution of this issue (Voevodin et al., 2005; Yang et al., 2007). According to the Hall–Petch equation, the strength properties of the material rise along with the reduction of the grain size. In case of the coatings deposited in the PVD processes, the structures obtained with grain size ~10 nm cause the obtainment of the maximum mechanical properties.

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