The Effect of N, C, Cr, and Nb Content on Silicon Nitride Coatings for Joint Applications.

Ceramic coatings deposited on orthopedic implants are an alternative to achieve and maintain high wear resistance of the metallic device, and simultaneously allow for a reduction in metal ion release. Silicon nitride based (SiN) coatings deposited by high power impulse magnetron sputtering (HiPIMS) have shown potential for use in joint replacements, as a result of an improved chemical stability in combination with a good adhesion. This study investigated the effect of N, C, Cr, and Nb content on the tribocorrosive performance of 3.

Synthesis and properties of CS F thin films deposited by reactive magnetron sputtering in an Ar/SF discharge.

A theoretical and experimental study on the growth and properties of a ternary carbon-based material, CS F , synthesized from SF and C as primary precursors is reported. The synthetic growth concept was applied to model the possible species resulting from the fragmentation of SF molecules and the recombination of S-F fragments with atomic C. The possible species were further evaluated for their contribution to the film growth.

SiNx Coatings Deposited by Reactive High Power Impulse Magnetron Sputtering: Process Parameters Influencing the Nitrogen Content.

Reactive high power impulse magnetron sputtering (rHiPIMS) was used to deposit silicon nitride (SiNx) coatings for biomedical applications. The SiNx growth and plasma characterization were conducted in an industrial coater, using Si targets and N2 as reactive gas. The effects of different N2-to-Ar flow ratios between 0 and 0.

Mechanical properties of graphene nanoribbons.

Herein, we investigate the structural, electronic and mechanical properties of zigzag graphene nanoribbons in the presence of stress by applying density functional theory within the GGA-PBE (generalized gradient approximation-Perdew-Burke-Ernzerhof) approximation. The uniaxial stress is applied along the periodic direction, allowing a unitary deformation in the range of ± 0.02%.

Tetra-kis[μ-2-(3-phenoxy-phen-yl)propionato-κO:O']bis-[(dimethyl-formamide-κO)copper(II)].

The title compound, [Cu(2)(C(15)H(13)O(3))(4)(C(3)H(7)NO)(2)], is formed by the chelate coordination of four racemic fenoprofenate (fenoprofenate is 2,3-phenoxyphenyl propionate) anions and two dimethyl-formamide mol-ecules to two copper(II) ions, building a paddle-wheel dinuclear mol-ecule. The distorted square-pyramidal coordination of each Cu(II) atom is made up of four O atoms of the four fenoprofenate units and another O atom from a dimethyl-formamide mol-ecule. The two enanti-omeric forms of the fenoprofenate anions are present in the complex, in an optically inactive centrosymmetric arrangement.