Mechanical properties of materials with nanometer scale microstructures. Progress report, 1 April 1989 to Present

Nix, W.D.

doi:10.2172/10106585

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2001

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“…F) Due to missing inversion symmetry [111] and [11 " 1 1] directions are not equivalent in materials of ZnS structure, hence the two polar (111) and (11 " 1 1) surfaces, terminated by A II and B VI atoms, can behave different. However, one should take into account, that owing to the three-dimensional stress field and the resulting orientation-averaging indentation proves considerably less orientation sensitive than uniaxial deformation [40]. Hirsch et al investigated the microhardness of A III and B V (111) surfaces in GaAs [41].…”

Section: Summary and Discussionmentioning

confidence: 99%

On the Impact of Light on Nanoindentations in ZnSe

Wolf

Belger

Meyer

et al. 2001

phys. stat. sol. (a)

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Subject classification: 62.20.Fe; 62.20.Qp; S8.12 The (111Zn) surface of single-crystalline ZnSe was subject to nanoindentations in darkness and under illumination using white light. A positive photoplastic effect was observed in the load range from 200 mN to 2 mN: a reduction of the penetration depth by about 5%, resulting in a reversible hardness increase by 10% under illumination. The effect was found to saturate already at 30 mW/ cm 2 , comparable to daylight intensity. There is also a photoplastic after-effect for some seconds, i.e. a reduced hardness increase was found after having turned off the light some seconds before performing the indent.

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Section: Summary and Discussionmentioning

confidence: 99%