Powder metallurgy structural parts manufacturers tell you that general powder metallurgy friction materials are multi-component composite materials composed of metal matrix, friction components and lubricating components. Among them, the main function of the metal matrix is ​​to accommodate the ceramic components and lubricants in it through mechanical combination to form a whole with a certain strength. The matrix is ​​metal, and its microstructure and physical and chemical properties largely determine the friction and wear properties, thermal stability, mechanical properties and thermal conductivity of powder metallurgy parts.

The matrix composition of powder metallurgy materials usually adds a certain amount of alloying elements, such as copper, tungsten, nickel, phosphorus, chromium, molybdenum and silicon, to the iron-based matrix to improve the performance of the matrix. Powder metallurgy structural parts manufacturers tell you that the added alloying elements will form alloy pearlite with Fe in the matrix, forming carbide phase or intermetallic compound phase, thereby improving the high temperature strength and oxidation resistance of the matrix, and greatly reducing the wear of the material.
Alloying elements added to the matrix of copper-based powder metallurgy brake materials include zinc, nickel, aluminum, titanium, molybdenum, and tin. Powder metallurgy structural parts manufacturers tell you that the commonly used friction components in friction materials are silica, alumina, silicon carbide, B4C, etc. The main purpose of adding friction components is to improve the friction coefficient of the matrix material and enhance the strength of the matrix.
Powder metallurgy structural parts manufacturers tell you that it is generally believed that it is more suitable to add silica as a friction agent to copper-based friction materials. SiO 2 can increase the coefficient of friction and reduce wear. However, some studies have shown that the silica is reduced and dissolved in the iron, resulting in lower iron carbide content and thus lower friction properties.