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Synergistically Toughening Effect of SiC Whiskers and Nanoparticles in Al_2O_3-based Composite Ceramic Cutting Tool Material 被引量:4
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作者 LIU Xuefei LIU Hanlian +3 位作者 HUANG Chuanzhen WANG Limei ZOU Bin ZHAO Bin 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2016年第5期977-982,共6页
In recent decades, many additives with different characteristics have been applied to strengthen and toughen Al2O3-based ceramic cutting tool materials. Among them, SiC whiskers and SiC nanoparticles showed excellent ... In recent decades, many additives with different characteristics have been applied to strengthen and toughen Al2O3-based ceramic cutting tool materials. Among them, SiC whiskers and SiC nanoparticles showed excellent performance in improving the material properties. While no attempts have been made to add SiC whiskers and SiC nanoparticles together into the ceramic matrix and the synergistically toughening effects of them have not been studied. An Al2O3-SiCw-SiC np advanced ceramic cutting tool material is fabricated by adding both one-dimensional SiC whiskers and zero-dimensional SiC nanoparticles into the Al2O3 matrix with an effective dispersing and mixing process. The composites with 25 vol% SiC whiskers and 25 vol% SiC nanoparticles alone are also investegated for comparison purposes. Results show that the Al2O3-SiCw-SiCnp composite with both 20 vo1% SiC whiskers and 5 vol% SiC nanoparticles additives have much improved mechanical properties. The flexural strength of Al2O3-SiCw-SiCnp is 730+ 95 MPa and fracture toughness is 5.6 ± 0.6 MPa.m1/2. The toughening and strengthening mechanisms of SiC whiskers and nanoparticles are studied when they are added either individually or in combination. It is indicated that when SiC whiskers and nanoparticles are added together, the grains are further refined and homogenized, so that the microstructure and fracture mode ratio is modified. The SiC nanoparticles are found helpful to enhance the toughening effects of the SiC whiskers. The proposed research helps to enrich the types of ceramic cutting tool and is benefit to expand the application range of ceramic cutting tool. 展开更多
关键词 Al2O3-based ceramic cutting tool materials SiC whiskers SiC nanoparticles mechanical properties toughening and strengthening mechanisms
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TiB_2-TiN-Ni-C_(sf)陶瓷刀具与316L奥氏体不锈钢间的干摩擦磨损性能研究 被引量:1
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作者 曹磊 宋金鹏 高杰 《工具技术》 2019年第3期24-27,共4页
研究了TiB_2-TiN-Ni-C_(sf)(TTNC)陶瓷刀具材料与316L奥氏体不锈钢间的摩擦磨损性能,结果表明:当载荷为65N时,随着滑动速度从6m/min增大到15m/min,对磨材料间的摩擦系数和TTNC陶瓷刀具材料的磨损率逐渐减小;当滑动速度为15m/min时,载荷... 研究了TiB_2-TiN-Ni-C_(sf)(TTNC)陶瓷刀具材料与316L奥氏体不锈钢间的摩擦磨损性能,结果表明:当载荷为65N时,随着滑动速度从6m/min增大到15m/min,对磨材料间的摩擦系数和TTNC陶瓷刀具材料的磨损率逐渐减小;当滑动速度为15m/min时,载荷由55N增加到60N时,对磨材料间的摩擦系数和TTNC陶瓷刀具材料的磨损率增加缓慢;当载荷由60N增加到70N时,摩擦系数与磨损率急剧增加。磨损后的TTNC陶瓷刀具材料表面留有犁沟、片层结构、凹坑以及撕裂面,TTNC陶瓷刀具材料的磨损机理为磨粒磨损和粘着磨损。 展开更多
关键词 tib2-TiN-Ni-Csf陶瓷刀具 摩擦系数 磨损机理
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TiB2基切削刀具的制备和摩擦学性能研究 被引量:2
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作者 范晓文 王国珍 卢凤祥 《金刚石与磨料磨具工程》 CAS 北大核心 2019年第6期62-68,共7页
采用热压烧结法制备了3组不同成分配比的TiB 2基切削刀具,对比分析了B73H18N0、B49H18N24和B41H18C32刀具的显微组织、力学性能和摩擦学性能。结果表明:添加TiN和TiC的B49H18N24和B41H18C32刀具中未形成新的物相;3种TiB 2基切削刀具试... 采用热压烧结法制备了3组不同成分配比的TiB 2基切削刀具,对比分析了B73H18N0、B49H18N24和B41H18C32刀具的显微组织、力学性能和摩擦学性能。结果表明:添加TiN和TiC的B49H18N24和B41H18C32刀具中未形成新的物相;3种TiB 2基切削刀具试样的硬度、抗弯强度和断裂韧性从高至低顺序依次为B73H18N0>B41H18C32>B49H18N24,B73H18N0>B41H18C32>B49H18N24和B41H18C32>B49H18N24>B73H18N0。在相同滑动速度或者载荷下,3种TiB 2基切削刀具与TA2钛合金的磨损率都随着载荷或者滑动速度增加而增大,但B41H18C32刀具的磨损率最低,即其与TA2钛合金对磨时耐磨性更好。3种TiB 2基切削刀具在干摩擦磨损过程中的磨损机制为磨粒磨损、黏着磨损和氧化磨损,且主要为黏着磨损。 展开更多
关键词 tib 2基切削刀具 微观组织 摩擦学性能 磨损机理
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添加TiO_(2)对Si_(3)N_(4)陶瓷刀具切削性能的影响 被引量:1
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作者 周宇章 魏万鑫 +2 位作者 罗嗣春 郭伟明 林华泰 《机械工程材料》 CAS CSCD 北大核心 2022年第5期64-69,76,共7页
通过气压烧结制备添加质量分数5%TiO_(2)的Si_(3)N_(4)陶瓷并制成刀具,研究了TiO_(2)对其显微组织、力学性能和切削性能的影响,并与未添加TiO_(2)烧结Si_(3)N_(4)陶瓷作对比。结果表明:添加TiO_(2)烧结Si_(3)N_(4)陶瓷主要由长棒状与等... 通过气压烧结制备添加质量分数5%TiO_(2)的Si_(3)N_(4)陶瓷并制成刀具,研究了TiO_(2)对其显微组织、力学性能和切削性能的影响,并与未添加TiO_(2)烧结Si_(3)N_(4)陶瓷作对比。结果表明:添加TiO_(2)烧结Si_(3)N_(4)陶瓷主要由长棒状与等轴状的β-Si_(3)N_(4)晶粒组成,并伴有均匀分布的TiN相,与未添加TiO_(2)烧结Si_(3)N_(4)陶瓷相比,晶粒得到细化,硬度上升而断裂韧度略有下降;在连续切削灰铸铁过程中,添加TiO_(2)的Si_(3)N_(4)陶瓷刀具具有更长的切削寿命(有效切削长度为2410 m),并且保持了刃口的完整性,切削后黏着磨损碎片较小。 展开更多
关键词 Si_(3)N_(4)陶瓷刀具 TiO_(2) 显微组织 力学性能 切削性能
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