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Nanometer ceramic spring producing method

A production method and nano-ceramic technology, applied in the direction of low internal friction springs, springs/shock absorbers, mechanical equipment, etc., can solve the problems of inability to mass-produce ceramic springs, difficult to meet practical requirements, high manufacturing costs, and eliminate surface pores. Defects, low cost, effect of improving quality

Inactive Publication Date: 2004-02-04
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the broad prospects for the application of ceramic springs, major industrial countries such as the United States and Japan are currently working on the development of ceramic springs, but they are all in the laboratory stage, with high manufacturing costs and complicated processes, and cannot mass-produce ceramic springs to meet the growing demand.
Moreover, due to defects such as pores, the quality of the product is unstable and the reliability is poor, so it is difficult to meet the practical requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Nanoscale ZrO 2 Powder 1000g, acrylamide 100g, ammonium polyacrylate 12.5g, water 1500g, ammonium persulfate aqueous solution (ammonium persulfate content 1%) 20g. 100g of acrylamide, 12.5g of ammonium polyacrylate, and 1500g of water were prepared into a premix and nano-sized ZrO 2 Put 1000g of powder together into a ball mill and mix to obtain a slurry. After vacuum degassing the slurry, add 20g of ammonium persulfate aqueous solution and mix it, inject it into a spring mold, wait for the slurry to solidify, and demould it, then put it in an oven and heat it to 100°C for drying. After natural cooling to obtain the spring green body, put the spring green body into a resistance furnace and heat it to 800°C and keep it warm for 0.5 hours, perform debinding treatment, discharge organic components, put it into a slurry with a concentration of 50wt% after natural cooling , soak the slurry for 10 minutes in a vacuum environment to eliminate pores, and finally place the dens...

Embodiment 2

[0036] Nanoscale ZrO 2 Powder 1000g, methylcellulose 4wt%, glycerin 2wt%, water 15wt%, polyvinyl alcohol solution (PVA content is 12wt%) 8wt%. Add the powder and forming agent into the vacuum mud refining machine to fully stir the mud, extrude it into a wire, and then roll it into a spring by a spring coiling machine, dry it in an oven at 100°C for 1 hour, and then set the shape, cut off both ends to obtain a spring For the green body, the diameter of the spring wire is about 2.5mm, the outer diameter is about 25mm, and the number of turns is 10. Bisque firing at 800°C for 0.5 hour in a resistance furnace to remove organic molding agents. Then carry out densification under vacuum, the slurry concentration is 50wt%, and the soaking time is 10 minutes. The densified green body was sintered without pressure at 1600° C. for 1 hour to obtain a finished product. The diameter of the finished spring wire is about 2mm, the outer diameter is about 25mm, and the number of effective tu...

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Abstract

A process for preapring nano ceramic spring includes such steps as mixing ZrO2 nanoparticles with premixed liquid, ball grinding, vacuum deaerating, adding trigger moulding, solidifying demoulding, drying, heating to 700-1200 deg.C for 0.5-2 hr, degumming, immersing in slurry for 10-30 min, putting in supporter in powder, and sintering at 1400-1700 deg.C for 0.5-3 hr.

Description

technical field [0001] The invention relates to a production method of a non-metallic spring, in particular to a production method of a nano ceramic spring. Background technique [0002] Helical springs are commonly used elastic parts and are widely used in various mechanical equipment. They are usually made of metal materials, but metal springs have poor heat resistance, corrosion resistance and wear resistance. In contrast, ceramic materials have excellent properties such as high temperature resistance, corrosion resistance, and wear resistance, and have been widely used in various fields. However, because ceramics are brittle materials, they have not been able to be directly made into springs in the past. However, with the development of nano-manufacturing technology and high-performance ceramic technology, some nano-scale ceramic materials with high toughness such as zirconia (ZrO 2 ), silicon nitride (Si 3 N 4 ) has been developed and widely used in the machinery ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/00F16F1/02
Inventor 郭露村陈涵
Owner NANJING TECH UNIV
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