Multiphase (MP) monoclinic and cubic Y2O3 nanoparticles, 40 nm in diameter, were densified by spark plasma sintering for 5–15 min and100 MPa at 1000 C, 1100 C, and 1500 C. Densification started with pressure increase at room temperature. Densification stagnated during heating compared to the high shrinkage rate in cubic single-phase reference nanopowder. The limited densification of the MP nano...

The propagation of shear waves differs between geo-media due to layer’s structure and irregularity present in different layers. This paper studies the propagation of shear waves in a monoclinic layer with irregularity lying between two isotropic semiinfinite elastic medium. The displacement in the monoclinic layer is obtained by using perturbation technique. Then the dispersion relation is foun...

A mathematical model of damped flexural–torsional vibrations monoclinic composite strip constant-length rectangular cross section is proposed. The based on the refined Timoshenko beam-bending theory, theory generalized Voigt–Lekhnitskii torsion, and elastic–viscoelastic correspondence principle in linear viscoelasticity. two-stage method for solving a coupled system differential equations devel...