Perhaps the most critical structural system aboard the Space Station is the Solar Alpha Rotary Joint which helps align the power generation system with the sun (Figure 1). The joint must provide structural support and controlled rotation to the outboard transverse booms as well as power and data transfer across the joint. The Solar Alpha Rotary Joint is composed of two transition sections and a...

Diamond coatings were successfully deposited on tool steel substrates without using any external diffusion barrier layers. The diamond film deposition was performed in a hot filament chemical vapour deposition (HFCVD) reactor. In the first step, a high substrate temperature and a high methane percentage were used to achieve a faster critical carbon concentration and hence a shorter incubation t...

Zhao, S. 2016. Theoretical Studies of Diamond for Electronic Applications. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1370. 63 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-554-9565-7. Diamond has since many years been applied in electronic fields due to its extraordinary properties. Substitutional dopants and surface functiona...

A high-pressure silicon infiltration technique was applied to sinter diamond–SiC composites with different diamond crystal sizes. Composite samples were sintered at pressure 8 GPa and temperature 2170 K. The structure of composites was studied by evaluating x-ray diffraction peak profiles using Fourier coefficients of ab initio theoretical size and strain profiles. The composite samples have pr...

Using classical molecular dynamics with a more reliable reactive LCBOPII potential, we have performed a detailed study on the direct graphite-to-diamond phase transition. Our results reveal a new so-called "wave-like buckling and slipping" mechanism, which controls the transformation from hexagonal graphite to cubic diamond. Based on this mechanism, we have explained how polycrystalline cubic d...

The paper studies the exact solution of two kinds generalized Fokker-Planck equations in which integral kernels are given either by distributed order function $k_{1}(t) = \int_{0}^{1} t^{-\mu}/\Gamma(1- \mu) d\mu$ or Prabhakar $k_{2}(\alpha, \gamma; \lambda; t) e^{-\gamma}_{\alpha, 1 - \mu}(\lambda; d\mu$, where is denoted as $e^{-\gamma}_{\alpha, t)$. Both these can be called fading memory fun...

Mineralogical structures of carbon phases within the ureilite North West Africa 4742, a recent find, are investigated at various scales by high-resolution transmission electron microscopy (HRTEM), Raman microspectrometry and X-ray diffraction. Ureilites are the most carbon-rich of all meteorites, containing up to 6 wt.% carbon. Diamond, graphite and so-called “amorphous carbon” are typically de...

Abstract In this paper we first establish the existence, uniqueness and Hölder continuity of solution to stochastic Volterra integral equations (SVIEs) with weakly singular kernels, singularities $\alpha \in (0, 1)$ for drift term $\beta 1/2)$ term. Subsequently, propose a $\theta $-Euler–Maruyama scheme Milstein solve numerically obtain strong rates convergence both schemes in $L^{p}$ norm any...

We make the split of integral fractional Laplacian as $(-\Delta)^s u=(-\Delta)(-\Delta)^{s-1}u$, where $s\in(0,\frac{1}{2})\cup(\frac{1}{2},1)$. Based on this splitting, we respectively discretize one- and two-dimensional with inhomogeneous Dirichlet boundary condition give corresponding truncation errors help interpolation estimate. Moreover, suitable corrections are proposed to guarantee conv...

Iron nanoparticles were employed to induce the synthesis of diamond on molybdenum, silicon, and quartz substrates. Diamond films were grown using conventional conditions for diamond synthesis by hot filament chemical vapor deposition, except that dispersed iron oxide nanoparticles replaced the seeding. X-ray diffraction, visible, and ultraviolet Raman Spectroscopy, energy-filtered transmission ...