Thermal stability

Main operational characteristics of abrasive instrumental materials is heat resistance - ability of materials to retain mechanical characteristics and structure upon multiple thermal disturbances. High heat resistance is ensured with, from one hand substance properties ñ low rate of coefficient of thermal expansion and modulus of elasticity, high rate of thermal conductivity, and, from the other hand, for its value affects the degree of perfection of crystal structure, number of impurities and defectiveness of material.


The degree of thermal stability is being evaluated as a result of comparison of basic mechanical strength of crystals and corresponding hardness after thermal treatment, including heating, isothermal exposure and cooling.





Measurement results of strength and thermal stability of diamond powder of MBH X series, size 40/45 US mesh.

 

Measurement results of strength and thermal stability of diamond powder of MBH X series, size 40/45 US mesh.

 

Type of powder

Static strength index, N

GOST

9206-80

Coefficient of thermal stability Indicator of thermal stability

Index of thermal stability

P, basic value- room temperature

P, after thermotreatment

MBH X 870

338,5

292,3

AC 200

0,86

9

HT

MBH X 860

342,5

256,6

AC 200

0,75 8

HT

MBH X 850

315,5

256,5

AC 200

0,81 8

HT

MBH X 840

292,5

235,2

AC 160

0,80 8

HT

MBH X 830

269,4

238,0

AC 160

0,88 9

HT

* the heat treatment was conducted in air environment at 1100 °— during 10 min.
Sizes available, US Mesh: 30/35, 30/40, 35/40, 40/45, 40/50, 45/50, 50/60, 60/70, 60/80.
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All pictures and technical data used in this brochure are property of Haris Division. Unauthorized duplication is a violation of copyright law.

All pictures and technical data used in this brochure are property of Haris Division. Unauthorized duplication is a violation of copyright law.