منابع مشابه
R2 enhancement by formation of a tungsten-iron alloy crystal in the apoferritin cavity
V. Clavijo Jordan, and K. M. Bennett School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, United States Introduction: A fundamental challenge in molecular MRI is the sensitivity to delivered contrast agents (1). Thus, there is a critical need to increase the relaxivity of current contrast agents to detect sub-nanomolar concentrations in vivo. Natural nanopar...
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The boronizing of a tungsten heavy alloy containing Ni and Fe as the major alloying elements were performed in the present study to increase its surface hardening. Pack cementation method was employed as a well-known, successful solid-state process for boronizing. The coating treatment was accomplished at different temperatures of 1000, 1050 and 1100°C for 6 and 9 hours. The formation of tu...
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Abstract: The objective of this research was to develop a tungsten heavy alloy (WHA) having a microstructure and properties good enough to penetrate hard rolled steels as deep as possible. In addition this alloy should not have environmental problems as depleted uranium (DU) materials. For this purpose a wide spread literature survey was performed and on the base of information obtained in ...
متن کاملCombustion Synthesis of Titanium-Tungsten Carbide Composites in Iron Matrix
Combustion synthesis has been used to produce Fe-(Ti,W)C composites. A simple reactor was designed which made it possible to ignite the samples under controlled atmosphere. Samples with different W/Ti ratio were ingnited under argon atmosphere by an electric arc and a self-propagating reaction was initiated in each sample. Different composites such as WC in Fe-Ti matrix, WC+(Ti,W)C in Fe matrix...
متن کاملCombustion Synthesis of Titanium-Tungsten Carbide Composites in Iron Matrix
Combustion synthesis has been used to produce Fe-(Ti,W)C composites. A simple reactor was designed which made it possible to ignite the samples under controlled atmosphere. Samples with different W/Ti ratio were ingnited under argon atmosphere by an electric arc and a self-propagating reaction was initiated in each sample. Different composites such as WC in Fe-Ti matrix, WC+(Ti,W)C in Fe matrix...
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ژورنال
عنوان ژورنال: Journal of the American Chemical Society
سال: 1897
ISSN: 0002-7863,1520-5126
DOI: 10.1021/ja02076a003