Size effect in compression of single-crystal gold microparticles

Compression Experiments on γ′-Nanoparticles

“…Furthermore, the electrochemical extraction process as described in [10,11] does not lead to surface damage and TEM investigations have confirmed that the particles are essentially defect-free [12]. Compared to deformation experiments on gold particles [3,4], the benefit is that the stress field in the cube-shaped particles is more uniform on compression, so that stress gradients are less influential.…”

“…The utilization of microscopically small components in mechanically loaded microsystems requires (i) development of suitable fabrication processes on the micro-and nanoscale, see, for example, Hoxhold and Büttgenbach [1] and Landefeld and Rösler [2] as well as (ii) understanding of the mechanical behavior at reduced dimensions, see for example, [3][4][5][6][7]. One way to obtain freestanding metallic components on the nanoscale is to extract precipitates from alloys and deform them between microhammer and microanvil in the scanning electron microscope (SEM).…”

From “Smaller is Stronger” to “Size‐Independent Strength Plateau”: Towards Measuring the Ideal Strength of Iron

“…This suggests that these particles are stable in ambient environment. Most of the iron nanoparticles we used have a spherical shape and therefore the significant effect of faceted surface on deformation reported by Mordehai et al [28] is not important in our test.…”

Atomistic Simulations of Compression Tests on Ni3Al Nanocubes

“…Small samples are often dislocation free, and thus require high stresses to nucleate dislocations. [3,4,33] Whether partial or full dislocations are nucleated depends on the size of the dislocation source, which scales with the sample size. [5,8] The critical size at which partial dislocation activity and twinning are observed to take over ODP is of the order of hundreds of nanometers, [3] with typical critical dislocation source sizes of D c ≈ 40 nm.…”