|Dec7-12, 11:47 PM||#1|
Is there a method of lowering linear expansion of a material?
I was just wondering if it was possible to change the linear expansion (and expansion in volume as volume expansion is three times the linear expansion) of a certain material. The coefficient being;
a = (Final Length - Initial Length)/ (Initial length) * (ΔT)
Is it possible to engineer a material to expand greater at lower temperature levels?
|Dec9-12, 05:47 AM||#2|
In some circumstances it is possible. Invar alloys, for example, are engineered such that magnetostriction compensates thermal expansion over a temperature range near room temperature. This is a very special case (and apparently still not fully understood) that cannot be generalized to other materials.
Are you thinking about a special material and temperature range?
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