Properties of iron and low-alloy powders produced by the Sulinsk Metallurgical Plant

Translated from Poroshkovaya Metallurgiya, No. 2(350), pp. 101–106, February, 1992.     

Replacement of Solid Chrome Plating with Boride Composite Coatings Based on Nickel and Iron

The feasibility of replacing solid chrome plating with a composite electrolytic coating based on Ni and Fe is discussed. The physical and mechanical properties of such a coating are shown to be on a par with or superior to those of solid chrome plating. The proposed coating costs less than does chrome plating.     

Heat-Resistant Antifrictional Composites with a Highly Alloyed Nickel Matrix

Technology for the production of new materials based on the heat-resistant powder metallurgy nickel alloy ÉP975 was developed, and the mechanical and tribological properties of these investigated. The formation features of the metallographic structure of the materials was studied. Recommendations for the practical use of the new composites are given.     

Small but strong: A review of the mechanical properties of carbon nanotube-polymer composites

The superlative mechanical properties of carbon nanotubes make them the filler material of choice for composite reinforcement. In this paper we review the progress to date in the field of mechanical reinforcement of polymers using nanotubes. Initially, the basics of fibre reinforced composites are introduced and the prerequisites for successful reinforcement discussed. The effectiveness of different processing methods is compared and the state of the art demonstrated. In addition we discuss the levels of reinforcement that have actually been achieved. While the focus will be on enhancement of Young’s modulus we will also discuss enhancement of strength and toughness. Finally we compare and tabulate these results. This leads to a discussion of the most promising processing methods for mechanical reinforcement and the outlook for the future.     

Dynamics of a Shock Wave in Laser-Induced Surface Air Breakdown

The amplitude and the time of arrival of a shock wave have been measured experimentally and calculated numerically at different distances from the region of the surface air breakdown by the radiation of a single-pulse YAG:Nd³⁺ laser for energy densities of 2.5–570 J/cm². Good agreement between the experimental and calculated values of the shock-wave amplitude beyond the breakdown region has been established. A more rapid propagation of the actual shock wave as compared to the calculated shock wave has been revealed for low energies of laser pulses, whereas a retarded propagation of the actual shock wave as compared to the calculated one has been revealed for high energies.     

Structure Formation of Multiphase Compacts in the System SiC′ ― Carbon. Part 3. Structure Formation in the System SiC′ ― Carbon during Sintering

The effect of particle size for the original silicon carbide and carbon powders and effects connected with influence of the original components structures, as well as the structure and phase composition of self-bonded silicon carbide are studied.