摘要
由于羟基磷灰石(Ca_(10)(PO_(4))_(6)(OH)_(2),HAP)纳米颗粒增强的镁基金属复合材料(MMCs)生物相容性和力学性能与骨骼组织非常相似,因此该材料被认为是可生物降解的备选材料。然而增强纳米颗粒的硬度较大,MMCs存在加工较为困难的问题,为了研究HAP质量分数为0.5%和1.0%的Mg/HAP MMCs微铣削加工特性,分析切屑参数对材料表面粗糙度及HAP纳米颗粒对表面形貌和切屑的影响。方差分析表明:随着HAP纳米颗粒含量的增加,主轴转速的影响减小,切削深度的影响增大。建议选择较小的每齿进给量和切削深度,以获得更好的表面粗糙度。尺寸效应的研究表明:当主轴转速和切削深度分别为40000 r/min和100μm时,Mg/HAP MMCs的最小切屑深度为1.1μm。
Mg-based metal matrix composites(MMCs)reinforced with HAP(Ca_(10)(PO_(4))_(6)(OH)_(2))nanoparticles are recognized as the biodegradable alternative materials due to their biocompatibility and mechanical properties which are very similar to bone tissue.Via analyzing the effects of chip parameters on the surface roughness of the material and HAP nanoparticles on the surface morphology and chip,the micro-milling characteristics of Mg/HAP(0.5%,1.0%)MMCs were studied.Analysis of variance showed that as the content of HAP nanoparticles increased,the influence of spindle speed decreased and the influence of cutting depth increased.It was recommended to choose smaller feed per tooth and cutting depth to obtain better surface roughness.The study of size effect showed that the minimum cutting depth of Mg/HAP MMCs was 1.1μm when the spindle speed and cutting depth were 40000 r/min and 100μm,respectively.
作者
张小雨
孙付仲
ZHANG Xiaoyu;SUN Fuzhong(College of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211800, China)
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
2021年第5期638-644,共7页
Journal of Nanjing Tech University(Natural Science Edition)
基金
国家自然科学基金(51805246)
江苏省自然科学基金(BK20180704)。
