Development of high-temperature ecologically clean friction materials of new generation and study of their wear properties

The nanoporous polymer friction materials on the basis of modified phenol‐formaldelyde resin and diatomite, modified by liquid silane, carbon black and basalt fibre have been developed. The physico-chemical and tribology properties of these materials were studied using friction machine IM-58. It was shown that these materials are characterized with stable friction coefficient and good wear stability at high temperature in the range of 500 - 600 ℃. The friction materials developed by us and low-metallic (LM) and non-asbestos organic (NAO) pad materials from the USA and EU markets were tested. The tests carried out using the pin-on-disc machine indicated the advantage of developed materials and it was shown that these materials form a considerably smaller amount of airborne wear particles than the conventional materials and the wear products of the latter contain not more then 5 elements while in foreign analogs this number was greater than 7-9. (author)