Effects of temperature and pressure on microcantilever resonance response

Impression creep behaviour of magnesium alloy-based hybrid composites in the longitudinal direction

“…Second way is a substructural strengthening effect due to features such as the increased dislocation density, which is present in the composite due to the thermal mismatch between the matrix and the reinforcement. However, the particulate reinforced Mg-MMCs might actually deteriorate the creep properties [2,3]. Mordike et al [2] suggested that the slip process at grain and particulate/matrix interfaces as well as diffusion caused a sudden increase in secondary creep rate, which lead to fracture of the specimens after a short period of loading in a 15 vol.% SiC particulates reinforced QE22 alloy.…”

“…However, the particulate reinforced Mg-MMCs might actually deteriorate the creep properties [2,3]. Mordike et al [2] suggested that the slip process at grain and particulate/matrix interfaces as well as diffusion caused a sudden increase in secondary creep rate, which lead to fracture of the specimens after a short period of loading in a 15 vol.% SiC particulates reinforced QE22 alloy. In another investigation, Moll et al [3] attributed the poorer creep resistance of the QE22 alloy reinforced with 15 vol.% SiC particulates, as compared to the monolithic QE22 alloy, to the additional contribution of boundary and interfacial sliding.…”

“…However, for temperatures above 200 C, metal matrix composites (MMCs) need to be developed. Particulate reinforced Mg-MMCs might actually deteriorate the creep properties [2,3]. Therefore, short fibre reinforced MMCs have to be developed for these applications.…”

Characterization system for resonant micro- and nanocantilevers

“…Observing the pressure dependency is important because of the great influence of dissipative and molecular damping on the Q factor of the cantilever. As most cantilever sensor applications require operation at atmospheric pressure, great effort has been put into describing the effect of pressure on the resonant properties of cantilevers-both experimentally [15][16][17][18][19] and theoretically. [20][21][22][23] The problem remains nontrivial though, and experimental observations are therefore of great importance for characterizing cantilever sensors.…”

Resonance frequency shift of strongly heated micro-cantilevers

“…II, we present experimental evidence of a frequency shift of the resonant modes of a cantilever when the light power of the optical measurement set-up is increased. This frequency shift is a signature of the temperature rise, 26,27,39,40 but its dependence on the mode number demonstrates that this temperature cannot be uniform on the cantilever. In Sec.…”