کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1507848 1511062 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Low temperature thermal conductivity of aluminum alloy 1200
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Low temperature thermal conductivity of aluminum alloy 1200
چکیده انگلیسی

The thermal conductivity of aluminum alloy 1200 was determined from 4.2 K to 160 K using a thermal conductivity integral method. This steady state method has been implemented in a cryostat having a cold finger cooled with liquid helium and nitrogen. These materials were considered to create thermal link for the Planck research satellite. Two samples are studied; the “as fabricated” 1200 alloy and the 1200 H19 (cold-drawn). As expected, the evolution of the thermal conductivity with temperature of both alloys follows the electronic thermal conductivity theory with a good accuracy below 60 K. At higher temperature, the thermal conductivity reaches a maximum then decreases as T−n and finally remains constant due to the electron–phonon scattering. As expected, the thermal conductivity of the cold-drawn alloy, 1200 H19, is reduced compared to that of the 1200 alloy due to a higher concentration of defects in the metal.


► We measured the thermal conductivity of 1200 aluminum alloys between 4 K and 150 K.
► The thermal conductivity follows the electronic thermal conductivity theory below 60 K.
► We examine the effect of strain hardening (cold-drawn) on thermal conductivity.
► Strain hardening reduces the thermal conductivity as expected.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cryogenics - Volume 51, Issues 11–12, November–December 2011, Pages 617–620
نویسندگان
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