Grinding performance improvement of laser micro-structured silicon nitride ceramics by laser macro-structured diamond wheels
Grinding performance improvement of laser micro-structured silicon nitride ceramics by laser macro-structured diamond wheels
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DOI：
10.1016/j.ceramint.2019.09.034
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发表时间：
2020
影响因子：
5.2
通讯作者：
Zhang Xiaohong;Weng Dongdong;Zhaoyao Shi;Li Si;Kang Zhongxiong;Jiang Jie;Zhang Zhicheng
中科院分区：
文献类型：
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作者：
Zhang Xiaohong;Weng Dongdong;Zhaoyao Shi;Li Si;Kang Zhongxiong;Jiang Jie;Zhang Zhicheng
氮化硅陶瓷由于其优异的特性：高硬度、高弹性模量、耐磨性和高耐热性而广泛应用于各个工业领域。金刚石砂轮磨削是加工氮化硅陶瓷的主要方法，也是生产率最高的方法。然而，由于金刚石砂轮和极其刚性的氮化硅之间的高摩擦，在磨削过程中会产生大量的热量。这会导致表面/表面下损坏、车轮磨损等，这损害了氮化硅的表面质量。这种损害会限制氮化硅陶瓷部件的使用。为提高砂轮表面质量和使用寿命，提出了一种激光宏微组合结构磨削方法。结果表明，LMMCSG磨削力比和表面粗糙度分别比常规磨削力比和表面粗糙度低31%和40%。此外，LMMCSG方法有效地减少了砂轮磨损和工件亚表面损伤。
Silicon nitride ceramics are widely used in various industrial fields because of their excellent characteristics: high hardness, high elastic modulus, abrasion resistance, and high heat resistance. Diamond wheel grinding is the predominant and most productive method to machine silicon nitride ceramics. However, a lot of heat is generated due to high friction between a diamond grinding wheel and extremely rigid silicon nitride during grinding. This causes surface/subsurface damage, wheel wear, etc., which impairs the surface quality of silicon nitride. This impairment can restrict the use of silicon nitride ceramic components. To improve the surface quality and service life of grinding wheels, a laser macro-micro combination structured grinding (LMMCSG) method was presented. The results indicated that the grinding force ratio and surface roughness when using LMMCSG were respectively 31% and 40% lower than the grinding force ratio and surface roughness when using conventional grinding. Moreover, the LMMCSG method effectively reduced the wheel wear and workpiece subsurface damage.