Fusible pattern moulding method of silicon carbide with complicated shape

A technology of shape silicon carbide and molding method, applied in the field of investment molding of complex shape silicon carbide, can solve the problems of low residual carbon rate, unfavorable industrial production, and high price of photosensitive resin

Inactive Publication Date: 2012-05-23
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method has certain limitations, both the price of photosensitive resin is higher and the residual carbon rate is lower, which is not conducive to industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: Curing molding: make a paraffin negative mold according to the shape of the silicon carbide part, then mix ethylene glycol and starch evenly in a 1:2 weight ratio to make a pore forming agent; then mix 2130# in a 1:1 weight ratio Thermosetting phenolic resin and pore forming agent are mixed and stirred evenly, then phenolic resin and benzenesulfonyl chloride with a total weight of 8% of ethylene glycol are added and mixed evenly to form a phenolic resin mixture, and the phenolic resin mixture is poured into a paraffin negative mold and left at room temperature The mixture is solidified and shaped to obtain a sample; deep solidification: the solidified sample is heated from an initial temperature of 60°C to 150°C, and the heating rate is 20°C / 12h, and the molten paraffin is recovered at the same time; carbonization: in N 2 Carry out carbonization under gas protection, heat from room temperature to 900°C for 1 hour, and the heating rate is 50°C / h, after compl...

Embodiment 2

[0012] Example 2: Curing molding: Make a paraffin negative mold according to the shape of the silicon carbide part, then mix ethylene glycol and starch evenly at a weight ratio of 1:0.5 to make a pore forming agent; then mix 2130# with a weight ratio of 1:3 Thermosetting phenolic resin and pore forming agent are mixed and stirred evenly, then phenolic resin and benzenesulfonyl chloride with 5% of the total weight of ethylene glycol are added and mixed evenly to make a phenolic resin mixture, and the phenolic resin mixture is poured into a paraffin negative mold, and left at room temperature The mixture is solidified and molded to obtain a sample; deep solidification: the solidified sample is heated from an initial temperature of 60°C to 120°C, and the heating rate is 20°C / 12h, and the molten paraffin is recovered at the same time; carbonization: in N 2 Carry out carbonization under gas protection, heat from room temperature to 700°C for 1 hour, and the heating rate is 50°C / h, a...

Embodiment 3

[0013] Embodiment 3: Curing molding: Make a paraffin negative mold according to the shape of the silicon carbide part, then mix ethylene glycol and starch evenly in a 1:1 weight ratio to make a pore forming agent; then mix 2130# in a 1:1.3 weight ratio Thermosetting phenolic resin and pore forming agent are mixed and stirred evenly, then phenolic resin and 10% benzenesulfonyl chloride by total weight of ethylene glycol are added and mixed evenly to make a phenolic resin mixture, and the phenolic resin mixture is poured into a paraffin negative mold and left at room temperature The mixture is solidified and molded to obtain a sample; deep solidification: the solidified sample is heated from an initial temperature of 60°C to 180°C, and the heating rate is 20°C / 12h, and the molten paraffin is recovered at the same time; carbonization: in N 2 Carry out carbonization under gas protection, heat from room temperature to 1000°C for 1 hour, and the heating rate is 50°C / h, after completi...

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PUM

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Abstract

The invention discloses a method for moulding and shaping complex-shaped carborundum. According to the requirements of the actual shape of a carborundum moulded piece, a paraffin female die is designed and processed; then phenolic resin mixture is poured in the die and is solidified for shaping at room temperature. Later, by deep solidification and carbonization, the multi-hole carbon blanker with the shape of the moulded piece is prepared. However, the paraffin die is melted during deep solidification and removed automatically; meanwhile, the melted paraffin is collected for recycling. Finally, siliconizing is carried out on the multi-hole carbon blanker, and the moulded piece of carborundum with the designed shape is prepared, which can be applied to use in the environments of corruption, abrasion, oxidation and high temperature. The method effectively solves the problems of complex shaping and net shaping of carborundum, and is characterized by low cost, one-step shaping, easy industrial production, not requiring demoulding and repeated utilization to die material, etc.

Description

technical field [0001] The invention relates to a molding process of difficult-to-add ceramic parts, in particular to an investment molding method of complex-shaped silicon carbide. Background technique [0002] Silicon carbide ceramic is a material with good comprehensive properties. Silicon carbide ceramics have the characteristics of low density, high thermal conductivity, low thermal expansion coefficient, good thermal shock resistance, good oxidation resistance, high temperature strength, corrosion resistance, etc., and have been used in many industrial fields. For example, in the aerospace industry, it is used to prepare the inner wall, nozzle and nose cone of rocket engine combustion; in the automotive industry, it is used to prepare turbocharger rotors. However, the preparation of silicon carbide with complex shape and net shape has always been a key technology restricting the popularization and application of silicon carbide ceramics. U.S. Patent (3859421, 1975) p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/565C04B35/622
Inventor 乔冠军徐顺建李杰李涤尘高积强王红洁杨建锋王继平
Owner XI AN JIAOTONG UNIV
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