High-precision CTE measurement of aluminum-alloys for cryogenic astronomical instrumentation[J] . I. Mochi,S. Gennari,E. Oliva,C. Baffa,V. Biliotti,G. Falcini,E. Giani,G. Marcucci,M. Sozzi,L. Origlia,E. Rossetti,M. Gonzalez.Experimental Astronomy . 2009 (1)...
The dimensional change of aluminum and its alloys with a change of temperature is roughly twice that of the ferrous metals. The average CTE for commercially pure metal is 24×10–6/K (13×10–6/°F). Aluminum alloys are affected by the presence of silicon and copper, which reduce expansio...
However, commonly used heat-sink materials (e.g., copper and aluminum alloys) have a much higher coefficient of thermal expansion (CTE) than silicon. CTE mismatch between the various materials in an electronic package can lead to stresses that can trigger complex failure mechanisms like component...
Development of As-Cast High Strength Aluminum Alloys with Ni and Sr addition With the advent of downsized engines, castable high strength aluminum alloys for lightweight engine components are urgently needed for the replacement of cast iron. The aim of this study is to develop new casting aluminum...
In this investigation, the effects of bolt strength and the mismatch in the coefficient of thermal expansion (CTE) of magnesium alloy AZ91D and the bolt material has been determined for a wide range of materials (martensitic steel, austenitic stainless steel, ductile iron and aluminum alloys). ...
Aluminum alloys reinforced with natural graphite platelets were demonstrated to have engineered the coefficient of thermal expansion (CTE) over the range of 9 ppm/K to 4 ppm/k while exhibiting respective thermal conductivity values 700 to 800 W/mK. Thus, CTE can be locally matched to any known...
So far, aluminum and other metallic alloys were the only materials able to satisfy those criteria, despite their weight, cost and long times of machining. The goal of this research was to improve the current state-of-the-art, developing a highly conductive polyurethane board, with a low CTE...
Super invar alloy consists of about 32 weight percent nickel, roughly 5 percent cobalt, balance iron, and trace amounts of other metals and minerals like copper, aluminum, and manganese. Super invar has minimal thermal expansion at room temperature. The optical structures made by super invar can...