Method for Improving the Aircraft Hydraulic Drives Ability to Work

One of the approaches to ensure friction stability in hydraulic precise pairs can be coating their components with low-friction materials with the friction coating method using a metal, e.g. brass. The article presents the method of applying brass on the steel surface of a hydraulic pair using friction. It discusses the technology of brass plating of hydraulic precise pairs and the results of laboratory tests involving friction-brasses hydraulic precise pairs. The factors impacting the quality of brass-coating process of hydraulic precise pairs and the requirements set for hydraulic precise pairs subject to friction-brassing were also discussed.

Examination of Rubber-Brass Inter-Reacted Layer of Steel Cord by Cross Sectional TEM Observation

Cross sectional TEM observation was conducted with the aim of investigating the interfacial reaction of commercially manufactured steel cord and rubber during vulcanization. At the initial phase of the reaction, an inter-reacted layer was uniformly generated regardless of uneven brass thickness. As vulcanization progresses, the thickness of the interreacted layer becomes uneven, i.e. the thicker the brass plate, the thicker the inter-reacted layer becomes. Thus, the inter-reacted layer grows unevenly making a mirror image of the uneven brass plate, while a Zn-rich brass layer was formed between the brass plating and the inter-reacted layer.