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Is there a method of lowering linear expansion of a material? 
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#1
Dec712, 11:47 PM

P: 3

Hi,
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? 


#2
Dec912, 05:47 AM

P: 660

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.
http://en.wikipedia.org/wiki/Invar Are you thinking about a special material and temperature range? 


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