Phase transformations in (111) Si after spherical indentation

Phase transformations induced by spherical indentation in ion-implanted amorphous silicon

The deformation behavior of ion-implanted unrelaxed and annealed ion-implanted relaxed amorphous silicon a-Si under spherical indentation at room temperature has been investigated. It has been found that the mode of deformation depends critically on both the preparation of the amorphous film and the scale of the mechanical deformation. Ex situ measurements, such as Raman microspectroscopy and c...

Submonolayer Au on Si(111) phase diagram

Based on a review of the current literature, a surface phase diagram is proposed for the submonolayer Au on Sit 111 ) system. Kinetic considerations are reviewed and key surface phase diagram features such as the O < 0.4 ML metastable Sit 11 l )-1~/3 x ~/3 tR30 Au structure and the high temperature Si(11 l )-(V3 x ~/3tR3q'-Au to Sil 1 l 1 )-( 1 x 1 tAu second order phase transition are discusse...

Surface phase diagrams for the Ag–Ge(111) and Au–Si(111) systems

Based on results from recent structural studies and an overview of the literature, we propose surface phase diagrams for the Au–Si(111) system in the supermonolayer regime and for the Ag–Ge(111) system in the submonolayer region. In addition, time–temperature–transformation (T–T–T) curves are proposed to represent the metastable structures present in surface phase systems. © 2000 Elsevier Scien...

Spherical indentation of elastic-plastic solids

The finite-element method is used to perform an accurate numerical study of the normal indentation of an elastic-plastic half-space by a rigid sphere. The effects of elasticity and strain-hardening rate of the half-space are explored, and the role of friction is assessed by analysing the limiting cases of frictionless contact and sticking friction. Indentation maps are constructed with axes of ...

Spherical Indentation Hardness of Shape Memory Alloys