Low-temperature Grinding Research Articles

Electrical conductivity in a layer formed by low-temperature grinding in germanium

Electrical-conductivity and Hall-effect measurements have been made for germanium surface layers damaged by grinding at room temperature and at low temperature (77 and 4.2 K). A comparison is made with cleaved surfaces. There are similarities and differences between the ground surfaces and those made by cleaving at low temperatures. The results are discussed on the assumption that most of the conductivity involves the microcrack walls.

Lowtemperature Precision Grinding and Outlook of Its Development

At present conventional method of grinding process leads to initiation of the internal stresses, thermal cracks, burns and other damages of machined surfaces which strongly affects on the quality of machining parts. In the given article the lowtemperature precision grinding method (LPG) with special kinematics and comparatively low grinding speed is described. This method is characterised by the low cutting temperature (not above 370E), high quality of surface finish, planeness, high accuracy and efficiency of machining. The above-mentioned method is very effective for grinding and lapping of all kinds of cutting tool materials, such as cemented carbides, ceramics, SS, superhard alloys and so on. Comparative results between conventional and lowtemperature precision grinding of cutting tool materials are given in the same work.

Low-Temperature Grinding

This article gives a short survey of the process of low temperature grinding. A special emphasis is given on the clean high recycle process (CHR process), which has been developed by our company in order to treat small-size motors and wires.

Low Temperature Grinding of Some High Oil Content Seeds1

AbstractFreezing high oil seeds with liquid nitrogen and immediately grinding shortened time for required grinding considerably. Frozen seeds did not lose oil to the mill or storage container. Chemical analyses should be more accurate on samples frozen before grinding since there is no oil loss from ground material.

Low-Temperature Grinding Technique for Infrared Analysis of Propellants and Binders in Potassium Bromide Disks

A low-temperature grinding technique for the potassium bromide pressed-disk method was developed to obtain quantitative infrared spectra of propellants and propellant binders. The effects of grinding time and temperature on the intensities of infrared absorption bands were determined. The technique was applied to the study of the thermal degradation of a polyurethane propellant.