Preparation method of FeSi2 modified C/SiC braking material

A brake material and modification technology, which is applied in the field of preparation of C/SiC brake materials, can solve the problems of affecting fiber reinforcement and affecting the mechanical properties of materials, and achieve the effects of reducing raw material costs, improving mechanical properties, and saving energy.

Inactive Publication Date: 2015-08-19
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-temperature impregnation often intensifies the reaction between the melt and C/C, which affects the reinforcement of the fiber. In addition, cooling at high tem

Method used

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  • Preparation method of FeSi2 modified C/SiC braking material
  • Preparation method of FeSi2 modified C/SiC braking material
  • Preparation method of FeSi2 modified C/SiC braking material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1:

[0036] This example is a preparation of FeSi 2 The method of modifying the C / SiC brake material test block, the specific process is:

[0037] Step 1. Preparation of C fiber preform:

[0038] First, PAN-based T-300 (12K) carbon fiber is made into short fiber tire net and non-lattice cloth, and then a single layer of 0° non-lattice fabric, tire net, 90° non-lattice fabric, and tire net are successively stacked and laminated, and then Using acupuncture technology, the latitude cloth and the tire mesh are integrated. According to the required thickness, after repeated lamination, needling, lamination, needling..., a three-dimensional needled carbon fiber preform is obtained, the density of the preform is about 0.55g / cm 3 .

[0039] Step 2. Preparation of C / C composite material:

[0040] Using propylene as the precursor, PyC was deposited in the three-dimensional needle-punched C fiber preform at a deposition temperature of 900℃, a deposition time of 500h, and a density...

Example Embodiment

[0050] Example 2:

[0051] This example is to prepare FeSi 2 The method of modifying C / SiC brake test ring, the specific process is:

[0052] Step 1. Preparation of C fiber preform:

[0053] First, PAN-based T-300 (12K) carbon fiber is made into short fiber tire net and non-lattice cloth, and then a single layer of 0° non-lattice fabric, tire net, 90° non-lattice fabric, and tire net are successively stacked and laminated, and then Using acupuncture technology, the latitude cloth and the tire mesh are integrated. According to the required thickness, after repeated lamination, needling, lamination, needling..., a three-dimensional needled carbon fiber preform is obtained. The density of the preform is about 0.55g / cm 3 .

[0054] Step 2. Preparation of C / C composite material:

[0055] Using propylene as the precursor, PyC was deposited in the three-dimensional needle-punched C fiber preform at a deposition temperature of 900°C, a deposition time of 400h, and a density of 1.46g / cm. 3 C / C...

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Abstract

The invention relates to a preparation method of a FeSi2 modified C/SiC braking material. A method combining CVI with RMI is adopted to prepare the FeSi2 modified three-dimensional needled C/SiC braking material. The preparation method includes: taking FeSi75 alloy powder as a RMI infiltration raw material; obtaining the FeSi2 modified C/SiC braking material through a reactive melt infiltration (RMI) process. By the preparation method, raw material cost is lowered remarkably, and RMI process temperature is lowered; a FeSi2 phase is introduced into a C/SiC composite material, so that strength and heat conductivity of the braking material are improved, friction stability is improved, and wear rate is lowered.

Description

technical field [0001] The present invention belongs to the preparation method of C / SiC brake material, especially relates to a kind of FeSi 2 The preparation method of the modified C / SiC brake material is a method of preparing C / SiC-FeSi by using FeSi75 alloy by reactive melt infiltration (RMI) method. 2 method of brake material. Background technique [0002] C / SiC brake material, also known as carbon ceramic brake material, has the characteristics of light weight, high strength, high temperature resistance, excellent braking performance and insensitivity to the environment. It is the latest powder metallurgy brake material and C / C brake material. A generation of brake materials. [0003] Document "Heidenreich B, Renz R, Krenkel W. Short fiber reinforced CMC materials for high performance brakes. 4th International Conference on High Temperature Ceramic Matrix Composites (HT-CMC4) Proceedings. Germany: Wiley-VCH, 2001.809–815." A method for preparing chopped carbon fiber ...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/622
Inventor 范尚武杜勇张立同成来飞
Owner NORTHWESTERN POLYTECHNICAL UNIV
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