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While I agree in principle with David Lynch's answer, I think it's good to take a closer look at the phase diagram (adapted from http://upload.wikimedia.org/wikipedia/commons/4/46/Carbon_basic_phase_diagram.png): I added the arrows to show possible paths you might follow. Red path: diamond would become graphite before melting; the molten carbon becomes ...


2

To tear something apart outright by magnetostriction is, as far as I know, impossible for the following reason: all magnetic materials saturate, i.e. their domains become fully aligned as the magnetic field increases. Further increase of the magnetic field cannot align the domains any better than they are, so no further increase in magnetostrictive strain ...


2

The IR sensors that OP is talking about work by emitting IR from an LED and then measuring IR intensity reflected back from an object close enough (scroll to Sharp GP2Y0A21YK IR Proximity Sensor). Addressing the comments: the temperature of the robot and the resulting blackbody emission in the IR is small enough to be irrelevant to the question. IR is used ...


1

This is speculation, based on working in material field many, many years ago (before nano scale testing was a Thing). I believe that the smaller scale test can be more faithful to the underlying material properties: in essence, any large scale testing will be affected by the existence of irregularities in the material (grain boundaries, dislocations, ...



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