Surface friction characteristics of Si3N4 ceramics machined by rotary ultrasonic grinding

JING Jun-tao; FENG Ping-fa; WEI Shi-liang; WANG He-xu

doi:10.3788/OPE.20152311.3200

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Surface friction characteristics of Si₃N₄ ceramics machined by rotary ultrasonic grinding

更新时间：2020-08-13

- Surface friction characteristics of Si₃N₄ ceramics machined by rotary ultrasonic grinding
- Optics and Precision Engineering Vol. 23, Issue 11, Pages: 3200-3210(2015)
- 作者机构：
  
  1. 清华大学机械工程系北京,100084
  2. 哈尔滨工程大学机电工程学院,黑龙江哈尔滨,154001
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152311.3200
  CLC： TQ174.758.12;TH117
- Received：15 May 2015，
  
  Revised：13 July 2015，
  
  Published：25 November 2015
- 稿件说明：
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荆君涛, 冯平法, 魏士亮等. Si3N4陶瓷旋转超声磨削加工的表面摩擦特性[J]. 光学精密工程, 2015,23(11): 3200-3210

JING Jun-tao, FENG Ping-fa, WEI Shi-liang etc. Surface friction characteristics of Si3N4 ceramics machined by rotary ultrasonic grinding[J]. Editorial Office of Optics and Precision Engineering, 2015,23(11): 3200-3210
荆君涛, 冯平法, 魏士亮等. Si3N4陶瓷旋转超声磨削加工的表面摩擦特性[J]. 光学精密工程, 2015,23(11): 3200-3210 DOI： 10.3788/OPE.20152311.3200.

JING Jun-tao, FENG Ping-fa, WEI Shi-liang etc. Surface friction characteristics of Si3N4 ceramics machined by rotary ultrasonic grinding[J]. Editorial Office of Optics and Precision Engineering, 2015,23(11): 3200-3210 DOI： 10.3788/OPE.20152311.3200.

摘要

为了探索结构陶瓷材料在摩擦过程中表面形貌的变化规律及其对摩擦特性影响

分析了摩擦过程中材料的接触过程及力学关系

并对旋转超声磨削加工的Si

陶瓷试样开展了摩擦表面形貌、摩擦因数等特性的试验研究。首先根据接触特点和材料特性

基于分形理论推导出接触面总载荷计算公式

基于该公式建立了结构陶瓷摩擦因数分形模型。分析结果表明:当初始表面轮廓分形维数分别为1.4

1.45

1.5和1.55时

摩擦因数与摩擦后表面轮廓分形维数呈类似正态分布曲线。然后通过旋转超声磨削加工的Si

陶瓷试样面面接触摩擦试验

研究了摩擦后陶瓷材料表面微观形貌和摩擦因数变化规律

分析了各因素对摩擦因数的影响。试验结果表明:产生微观裂纹是Si

陶瓷摩擦后表面微观形貌的显著特点;温度值等于160℃是Si

陶瓷摩擦因数由下降转为上升的拐点;当施加载荷为360 N和往复频率为80 Hz时

摩擦因数最大。得到的结果为通过表面形貌控制提高结构陶瓷耐磨性能提供了技术支撑。

Abstract

For investigating on the surface morphology variation of structure ceramic materials and its effect on the friction characteristics during friction

the relationships between contact and mechanical were analyzed in friction process. Meanwhile

the friction characteristics of Si

ceramic samples machined by rotary ultrasonic grinding

such as friction surface morphology and friction coefficient were studied with experiments. First

according to the contact characteristics and material properties

the calculation formula of the total load was deduced based on fractal theory. The friction coefficient fractal model was also established on the basis of above. The analysis results shows that the relationship between friction coefficient and surface profile fractal dimension after friction is similar to the normal distribution curve

when the initial surface profile fractal dimension is 1.4

1.45

1.5 and 1.55 respectively. Then with surface to surface contact friction experiments of Si

ceramic sample machined by rotary ultrasonic grinding

surface topography and friction coefficient variation after friction were investigated. And the influence factors on the friction coefficient were also analyzed. The results indicate that micro-cracks are the notable feature of the surface morphology for Si

ceramic friction. The temperature of 160℃ is the inflection points of fall and rise for Si

ceramic friction coefficient. The friction coefficient is the maximum when the applied load is 360 N and reciprocating frequency is 80 Hz. It concludes that the machining surface morphology control improves the wear resistance of structure ceramics.

关键词

Keywords

references

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