Transformation-mismatch plasticity in sub-millimeter iron wires

Transformation-mismatch plasticity in sub-millimeter iron wires

Wires of 99.5% pure iron with 406 and 508!m diameter were subjected to a uniaxial tensile stress while being thermally cycled about the "–# allotropic transformation temperature. The strain increments per cycle are proportional to the applied stress in the range 1–22 MPa, indicating that transformation-mismatch plasticity is the dominant deformation mechanism. The strain increments for the wire...

Tensile Transformation-Mismatch Plasticity of Bismuth Sesquioxide

This study reports on experiments where bismuth sesquioxide (Bi2O3) was cycled between its high-temperature d-phase and one or more of its low-temperature phases (a-, b-, or g-Bi2O3) while being subjected to uniaxial tensile stresses in the range of 0.11–0.55 MPa. Reproducible strain increments of 0.4%–3.9% have been measured after each thermal cycle, and total tensile fracture strains of 10%–2...

Pseudo-Bessel Beams in Millimeter and Sub-millimeter Range

Sub-Cubic Millimeter Biomedical Implants

Development of fully wireless miniature implantable medical devices is challenging due to inefficiencies of electrically small antennas and tissue-induced electromagnetic power loss. Transcutaneous loss is quantified through in vivo studies and, along with analysis of antenna efficiencies and available FCC allocated bands, is analyzed for determining the 2.4GHz operating frequency. Orogolomisti...

Extended Interaction Klystron Technology at Millimeter and Sub-millimeter Wavelengths

This paper reviews the technology and demonstrated capability of mmW and Sub-mmW Extended Interaction Klystrons at CPI Canada. It discusses design and manufacturing concepts stating self-imposed restrictions and design modifications enhancing power capability, bandwidth and extending operating frequency into the THz region.