The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Al-Si alloys are widely used in aerospace and automobile industries due to their high strength-to-weight ratio and superior wear and corrosion resistance. Increasing the percentage of silicon in these alloys improves their wear resistance and strength considerably, but impairs their ductility. This problem can be overcome by refining the microstructure of hypereutectic alloys by varying the processing...
Template-assisted electrodeposition is an important technique for synthesizing metallic nanomaterials with controlled shape and size. Arrays of nanostructured materials with specific arrangements can be prepared by this method, employing either an active or restrictive template as a cathode in an electrochemical cell. An overview of the template-assisted electrodeposition process to synthesize metallic...
This article presents challenges and opportunities to control the microstructure in nanostructured coatings using ananocluster source. The cluster size distribution is monodisperse and the kinetic energy of the clusters during deposition can be varied. Interestingly, the clusters are grown in extreme non-equilibrium conditions leading to metastable structures of metals and alloys. Because one avoids...
Conclusion The development of the warrior of the future is an on-going project for the U.S. Army. “The Future Warrior of two or three years ago, a lot of the things that were in there, are now part of our Objective Force Warrior,” said DeGay. “We’re constantly looking at new ideas.”
Quantitative assessment of the flows of materials from resource extraction to final disposal informs resource policy, energy planning, environmental science, and waste management. This article reports the worldwide technological cycle of zinc for 1994. Of the 7,800 kt of zinc contained in ore mined worldwide, 17% was lost in conversion to metal and another 17% lost or recycled in fabrication and manufacturing...
In this article, metallurgical aspects of a 17th century forge-welded iron cannon at Thanjavur are addressed, including an analysis of manufacturing methodology based on careful observation of its constructional details. Microstructural examination of iron from the cannon reveals that the iron was extracted from ore by the direct process. Thus, the cannon was fabricated by forge welding and not by...
A critical issue to homeland security and defense is the development of broad range collectors and detectors of weapons of mass destruction. Nanoscience and nanotechnology are increasingly important in the area of such separation and detection. This article presents an overview of the research at the Forensic Science Center at Lawrence Livermore National Laboratory to develop nanostructured materials...
The modification and refinement of surface and subsurface microstructure in Al-Si-based cast alloys via laser-induced rapid solidification can create a natural topography suitable for engine applications. The differential wear of the soft aluminum phase, hard silicon, and CuAl in the cell, along with the divorced eutectic nanostructure in the intercellular region, is expected to produce and replenish...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.