Service-Induced Damages of the Ceramic Thrust Bearing Pivot in the Seal Section of Electrical Centrifugal Pump System

Refractories and Industrial Ceramics - The paper provides the results of studying the condition of the working pivot of thrust bearings made of reaction- sintered silicon carbide-based ceramics...     

Method of Nondestructive Testing for Technical State of Casing Strings in Oil-and-Gas Wells Basing on the Transient Electromagnetic Method

The laboratory investigations into electromagnetic parameters of the constructive elements of cased well are described. The algorithms, programs, as well as the results are discussed for the recovery of electromagnetic and geometric parameters of casing string by borehole measurements of electromotive force with the help of the transient electromagnetic method.     

Effect of Vacuum Hot Pressing Temperature on the Mechanical and Tribological Properties of the Fe–Cu–Ni–Sn–VN Composites

Powder Metallurgy and Metal Ceramics - The mechanical (hardness and elastic modulus) and tribological (friction force and wear rate) properties of the Fe–Cu–Ni–Sn–VN...     

A High-Pressure Cell for High-Temperature Experiments in a Toroid-Type Chamber

The design of a high-pressure cell for short-term (5–20 s) experiments in a toroid-type high-pressure chamber at a pressure of 8 GPa and a temperature up to 3100 K is described. The dependence of the temperature in the high-pressure cell on the electric power supplied to the heater is constructed on the basis of data on the incongruent melting of silicon carbide (SiC) under pressure.     

A Generator of Ultrashort Megavolt Pulses

A generator of voltage pulses with a duration of 3 ns and an amplitude of >1 MV across a high-resistance (450 ) load is described. The generator contains a pulse transformer with a biased core and a resonant circuit consisting of a high-voltage solenoid and capacitance of a forming line. This line contains a spark gap for switching a charge to the transmitting line with a lumped load at its end such as a vacuum diode. The results of voltage measurements of the basic units of the generator are presented.     

Experience in Coke Preparation for Blast-Furnace Smelting. Part 2

Metallurgist - We have reviewed the literature on coke preparation for blast furnace smelting, including studies on particle size distribution. We describe the basic requirements for coke quality...