HIGH WEAR RESISTANT HYBRID COMPOSITE BRAKE PAD FOR HEAVY DUTY APPLICATIONS.

Abstract

The invention relates to the field of friction-based brake pad materials used in braking systems, and specifically concerns a hybrid composite brake pad with high wear resistance, developed for braking systems operating under high contact pressure, temperature, and friction conditions, and the method of manufacturing this brake pad.

Description

HIGH ABRASION RESISTANT HYBRID COMPOSITE FOR HEAVY DUTY APPLICATIONS. BRAKE PADS TECHNICAL FIELD The invention relates to friction-based brake pad materials used in braking systems. It relates to the field, especially under high contact pressure, temperature and friction conditions. hybrid brake system with high wear resistance, developed for braking systems operating underneath. It relates to composite brake pads and the method of manufacturing these brake pads. PREVIOUS TECHNIQUE Brake pads are used in various braking systems, primarily on road and rail vehicles. These are friction materials used in systems. Traditional automotive brake pads, organic resins, metal and ceramic reinforcements, various fillers, and It is produced by combining friction modifiers. Organic-based NAO composites are environmentally friendly due to their low noise generation. It stands out with its user-friendly properties. However, the high quality of such composites... Wear rates are high under high temperature conditions. Semi-metallic and fully metal composites. These materials provide high thermal and mechanical resistance, however The use of ceramic-reinforced brake pads can increase rotor wear. However, mechanical brake pads... It offers advantages in terms of durability and temperature stability. In scientific studies, improving the tribological behavior of brake pads For this purpose, different materials such as SiC, ZrO₂, mineral fillers, glass fiber and natural fibers are used. The use of reinforcing materials has been investigated. These studies mainly focus on... to reduce the wear rate of brake pads, to regulate the friction coefficient, It aims to increase thermal stability and improve surface behavior. However, the general lifespan of current automobile brake pads is approximately It stays at around 10,000 km and brake pads need to be replaced at specific intervals. It is necessary. In addition, the high wear rate of existing brake pads, the temperature performance loss, limited service life, and structural issues that arise with increasing frequency. Technical problems such as instability are encountered. Especially high contact pressure, These problems become more pronounced in heavy-duty conditions where both heat and friction are present. It is becoming apparent. 1 THE PURPOSE OF THE INVENTION The aim of the invention is to overcome the high wear encountered in brake pads known in the technology. friction in working conditions where temperature and contact pressure increase, reducing the rate. a hybrid composite brake that maintains its performance and provides a longer service life The goal is to expose the brake pads. Another aim of the invention is to improve its mechanical and tribological performance for heavy-duty use. The goal is to obtain a dense and low-porosity composite structure that can be maintained under these conditions. The invention also involves the high-entropy alloy phase present in the structure of the brake pad. homogeneous distribution within the matrix, and prevents accidents that may occur during production. Minimizing grain growth and phase distortions in composite components The aim is to create high bond strength between them. Another aim of the invention is to reduce brake wear. to extend the service life and maintenance intervals of the brake pads, and also to prevent wear. The aim is to reduce the resulting particle formation. The objectives mentioned above can be achieved by using graphene and AlCrCuFeNi in a copper matrix. "Spark Plasma" composite brake pads containing high-entropy alloy reinforcements. This is achieved through production using the "sintering" method. DETAILED DESCRIPTION OF THE INVENTION The invention is suitable for automotive, rail transport, heavy machinery and industrial braking systems. especially for those operating under high contact pressure, temperature and friction conditions. It is a hybrid composite brake pad developed for use in braking systems. The subject is brake pads, a copper matrix, and graphene embedded within this matrix. AlCrCuFeNi is a high-entropy alloy composed of reinforcements. The expression refers to the elements aluminum (Al), chromium (Cr), copper (Cu), iron (Fe), and nickel (Ni). It refers to the resulting high-entropy alloy, and this alloy contains each element. It is obtained by mixing equal proportions by weight (20%). The main phase of the composite structure consists of a copper matrix. Graphene and AlCrCuFeNi high-entropy alloy is used as reinforcement within the copper matrix. It is obtained by combining these components, unlike conventional brake pads. This results in a hybrid structure that exhibits higher wear resistance. The AlCrCuFeNi high-entropy alloy used in the invention has multiple main components. It is formed by the combination of elements in approximately equal proportions. High This alloy, possessing configurational entropy, exhibits high hardness, wear resistance, and thermal properties. 2 It provides stability and mechanical strength. The brake phase of the high-entropy alloy. The inclusion of a stable and resistant microstructure on the friction surface into the brake pad structure This microstructure creates the microstructure that produces the braking fluid. Wear mechanisms are significantly suppressed. The invention concerns the production of hybrid composite brake pads using "Spark Plasma". The "sintering" method is used. The "Spark Plasma Sintering" method is used for composites. the structure is obtained in a short time with high density and low porosity This allows for the production of AlCrCuFeNi during the "Spark Plasma Sintering" process. homogeneous distribution of the high-entropy alloy phase within the copper matrix This is ensured. Thus, the formation that occurs between different regions of the composite structure Potential structural irregularities are reduced. At the same time, traditional Grain growth and phase distortions that can occur in sintering methods are minimized. It is being downloaded. High bond between composite components as a result of the sintering process. This creates a durable, dense, and structurally stable brake pad. This results in a low-porosity structure that improves the mechanical strength of the brake pad. and contributes to wear resistance. The use of a high-entropy alloy within a composite structure results in "Spark". The combined application of the "Plasma Sintering" method improves the mechanical and thermal properties of the brake pad. It creates a synergistic effect on their tribological properties. AlCrCuFeNi high Entropy alloy improves the hardness, wear resistance, and thermal stability of the friction surface. While increasing the intensity, the "Spark Plasma Sintering" method homogenizes this phase within the copper matrix. This ensures that the components are positioned correctly and that a strong connection is established between them. Thanks to this design, the brake pad in question, compared to conventional brake pads, It shows a lower wear rate. The friction behavior of the brake pad, It maintains its stability under high temperature and contact pressure. Mechanical and Maintaining tribological performance under heavy-duty conditions requires the brake pads to... automotive, rail transport, heavy construction machinery and industrial braking systems It makes it possible to use it. Reducing the rate of wear extends the service life of the brake pads and This increases the maintenance intervals at which the need for replacement arises. In addition, particle formation due to wear during use is decreasing. 3 In conclusion, the invention involves high-performance graphene and AlCrCuFeNi in a copper matrix. containing entropy alloy reinforcements and produced by the "Spark Plasma Sintering" method Thanks to its hybrid composite structure, it offers high wear resistance, long service life and heavy duty durability. a brake pad that offers stable friction performance under service conditions It places. 4

Claims

1. Brake operating under high contact pressure, temperature and friction conditions. Designed for use in systems, with high wear resistance. It is a hybrid composite brake pad, characterized by its copper matrix and the copper in question. Graphene and AlCrCuFeNi high-entropy alloy reinforcement within the matrix It is characterized by its inclusion.

2. Brake operating under high contact pressure, temperature and friction conditions. Hybrid composite with high wear resistance for use in systems This is the manufacturing method and characteristic of brake pads; - copper matrix with graphene and AlCrCuFeNi high-entropy alloy reinforcements bringing together and - the resulting composite structure, the high-entropy alloy phase, the copper matrix will ensure homogeneous distribution within it, particle growth and phase a high-density, low-porosity structure that will reduce their deterioration sintering using the Spark Plasma Sintering method to form It is characterized by including its steps.