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Corrections to: Structural Optimization of Fiber-Reinforced Material Based on Moving Morphable Components (MMCs)

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Acta Mechanica Solida Sinica 2022年第4期35卷 716-717页

作者： Zhi Sun Ziwen Song Junfu Song Haiyan Li Xu Guo State Key Laboratory of Structural Analysis for Industrial Equipment Department of Engineering MechanicsInternational Research Center for Computational MechanicsDalian University of TechnologyDalian116023China

Corrections to:Acta Mechanica Solida Sinica https://***/10.1007/s10338-021-00305-0 During production of the article unfortunately several typesetting mistakes have been introduced.In Eq.(17).

关键词： mistake Morph MMCs

Enhancement of wettability in AZ91/B_(4)C system by a mechanical purification of liquid alloy

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Journal of Magnesium and Alloys 2022年第11期10卷 3133-3142页

作者： Artur Kudyba Wojciech Polkowski Grzegorz Bruzda Adelajda Polkowska Donatella Giuranno Łukasiewicz Research Network-Krakow Institute of Technology Zakopian´ska 73 Str.30-418 KrakówPoland National Research Council of Italy Institute of Condensed Matter Chemistry and Technologies for EnergyVia De Marini 616149GenovaItaly

Mg-based alloys are potential candidate materials for a fabrication of lightweight boron carbide based composites through a reactive melt infiltration approach. In this paper, the effect of a mechanical purification of molten AZ91 alloy’s surface on its wettability with polycrystalline B_(4)C is experimentally evaluated for the first time. For this purpose, sessile drop experiments were performed under the same operating conditions(700℃/5 min;Ar atmosphere), by using both the classical contact heating(CH) and the improved capillary purification(CP) procedure. It was found that the evolution of contact angle values was strongly influenced by the applied procedure. In particular, by using the classical CH procedure, the presence of a native oxide layer on the metal surface hinders the observations of melting process, resulting in a misleading conclusion that the system is non-wettable. Contrarily, during the wetting test performed by applying the CP procedure, the surface oxide layer was mechanically removed by squeezing the molten AZ91 alloy through a capillary. Accordingly, the oxide-free AZ91 drop with a regular and spherical shape was successfully obtained and dispensed on the B_(4)C substrate. A reliable contact angle value of θ =83° was measured at the AZ91/B_(4)C triple line at 700 ℃, which in turn proves that B_(4)C is wetted by the liquid AZ91 alloy. In contradiction to the literature, these good wetting conditions were assisted by a non-reactive wetting mechanism occurring at the AZ91/B_(4)C interface. To succeed in the fabrication of AZ91/B_(4)C composites by liquid metal infiltration, such experimental observations make it reasonable to expect a spontaneous infiltration process exclusively driven by capillarity, which in turn increases the efficiency of the process by the absence of reaction products that could be a potentially detrimental factor.

关键词： AZ91 magnesium alloy Magnesium matrix composites Sessile drop Capillary purification procedure Wettability Contact angle MMCs B_(4)C

Interfacial failure behavior of PyC-C_f/AZ91D composite fabricated by LSEVI

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Journal of Materials Science & Technology 2018年第9期34卷 1602-1608页

作者： Shaolin Li Lehua Qi Ting Zhang Jiming Zhou Hejun Li State Key Laboratory of Solidification Processing Carbon/Carbon Composites Research Center Northwestern Polytechnical University School of Mechanical Engineering Northwestern Polytechnical University

Carbon fiber reinforced AZ91 D matrix composites with pyrolytic（PyC） coating deposited on fiber surface（PyC-Cf/AZ91 D composites） have been fabricated by Liquid-solid extrusion following vacuum pressure infiltration technique（LSEVI）. Interfacial microstructure and failure behavior of the composites were investigated. Instead of interfacial reaction products, block-shaped interfacial precipitates Mg（17） Al（12） were detected at the interface, which indicates that interfacial reaction was restrained by LSEVI and PyC coating. Nano-MgO was detected at the interface. Interfacial failure behavior of the PyC-Cf/AZ91 D composites,which was the failure between PyC coating and AZ91 D alloy due to the mismatch of thermal expansion and relatively poor bonding, was proposed. Fracture surface of the PyC-Cf/AZ91 D composites was characterized by fibers pulling-out tests. PyC coating served not only as protection to the fibers, but also an adjustment of the interface of the composites.

关键词： MMCs Interface Carbon fiber Failure

Direct ink writing of TiC-316L metal matrix composites with an epoxy resin-absolute ethanol system

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Rare Metals 2021年第3期40卷 590-599页

作者： Tao Lin Liu-Ping Jin Jia-Yun Yuan Hui-Ping Shao Fu-Cheng Yu Wen-Yuan Li Xin-Bo He Xin Deng Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China School of Material Science and Engineering Lanzhou University of TechnologyLanzhou 730050China Jihua Laboratory Chengye MansionFoshan 528299China School of Electromechanical Engineering Guangdong University of TechnologyGuangzhou 510006China

TiC-316 L metal matrix composites were successfully printed with an epoxy resin-absolute ethanol system by direct ink writing(DIW) process in this study.Microstructure and fracture morphology of the samples were observed by a scanning electron microscope(SEM).Also,the relative density,hardness and transverse rupture strength(TRS) of the sintered samples were tested.The results show that the samples prepared with a new epoxy resin-absolute ethanol system by the DIW process have high solid content of printing slurry,good surface roughness,high relative density and high strength.The solid content of the slurry suitable for DIW was 60 vol%,and the internal diameter of the nozzle was set to 0.4 mm,the printing speed was set to 30 mm·s^(-1),and the layer height was set to 0.36 mm.For the sample with 35 wt% TiC-316 L,the relative density,hardness and TRS of the sintered sample can reach 99.3%,HRA 79.5 and 1438 MPa,respectively.

关键词： DIW MMCs Epoxy resin TiC 316L

Wetting of molten cerium on typical carbon materials(graphite,CVD-diamond and NWCNT) and molten Cu-Ce alloys on graphite at 950℃

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Journal of Rare Earths 2021年第3期39卷 331-339,I0004页

作者： Ran Sui Qiaoli Lin Le Wang Fan Yang Department of Materials Science and Engineering Lanzhou Institute of TechnologyLanzhou 730050China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal Lanzhou University of TechnologyLanzhou 730050China

A series of experiments were conducted to investigate the wettability of graphite plate,graphite paper,NWCNTs Buckypaper,CVD-diamond by molten Ce and graphite plate by Cu-Ce binary alloy using a modified sessile drop ... 详细信息

关键词： Wettability MMCs Rare earth Brazing

HAP增强纳米颗粒对Mg/HAP MMCs微铣削特性的影响

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南京工业大学学报（自然科学版） 2021年第5期43卷 638-644页

作者：张小雨孙付仲南京工业大学机械与动力工程学院江苏南京211800

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,... 详细信息

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。

关键词：微铣削 MMCs HAP增强纳米颗粒尺寸效应

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前言

金属学报 2019年第1期55卷 I0001-I0002页

作者：马宗义中国科学院金属研究所

金属基复合材料(metal matrix composites,MMCs)是复合材料家族的重要分支,由金属和其它不同性质的异质材料复合而成,各组元发挥各自优势,产生协同效应,使综合性能显著提升,包括高的强度和模量,低的密度和热膨胀系数,优异的耐磨损、耐... 详细信息

金属基复合材料(metal matrix composites,MMCs)是复合材料家族的重要分支,由金属和其它不同性质的异质材料复合而成,各组元发挥各自优势,产生协同效应,使综合性能显著提升,包括高的强度和模量,低的密度和热膨胀系数,优异的耐磨损、耐疲劳、耐蠕变性能,良好的导热和尺寸稳定性等。过去半世纪,MMCs在体系设计、制备技术、加工工艺等研究领域不断突破创新,成果丰硕,在航天、航空、电子、核电与地面交通等领域的应用日益广泛,成为传统金属材料以外的重要材料体系。目前,MMCs的工业化生产已成为我国战略性新兴产业。

关键词：金属基复合材料 matrix MMCs 热膨胀系数尺寸稳定性工业化生产材料复合协同效应

Effect of Pressure on the Solidification Behavior and Mechanical Properties of SiCp/Al-Mg Composites

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Journal of Wuhan University of Technology(Materials Science) 2013年第2期28卷 274-278页

作者：张宏伟耿林 FAN Guohua SUN Yuan School of Materials Science and Engineering Harbin Institute of Technology Institute of Metal Research Chinese Academy of Sciences

SiCp/A1-Mg metal matrix composites were manufactured by semi-solid stirring technique. The composites were remelted and then solidified under different pressures to study the solidification behavior of composites by differential thermal analysis, scanning electron microscopy, and transmission electron microscopy. The experimental results show that SiCp reinforcements can not act as heterogeneous nucleation sites for c^（A1）, and an interfacial layer composed of MgA1204 spinel and Si-rich phase existed at A1/SiCp interface. The undercooling of the matrix alloy was improved by the pressure applied, resulting in the grain of matrix alloy refining. The X-ray diffraction pattern of composites testified that the matrix alloy exhibited a certain preferred orientation during solidification. In addition, with increasing the pressure for solidification, the pored defects in the composites decreased, while the relative density, hardness and compressive strength increased. Therefore, the microstructure and mechanical properties of the composites were improved by pressure placed during the solidification of SiCp/A1-Mg composites.

关键词： MMCs nucleation solidification behavior microstructure mechanical properties

异形旋转磨料电极电化学放电加工金属基复合材料实验研究

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异形旋转磨料电极电化学放电加工金属基复合材料实验研究

作者：林志彪广东工业大学

学位级别：硕士

利用磨料来辅助电化学放电复合加工工艺加工金属基复合材料,Metal Matrix Composites（MMCs）是一种相当具有发展前景的加工工艺,相对于电化学放电加工方法存在的缺陷,磨料辅助电化学放电复合加工方法具有更高的材料加工去除效率、更低... 详细信息

利用磨料来辅助电化学放电复合加工工艺加工金属基复合材料,Metal Matrix Composites（MMCs）是一种相当具有发展前景的加工工艺,相对于电化学放电加工方法存在的缺陷,磨料辅助电化学放电复合加工方法具有更高的材料加工去除效率、更低的工具电极相对损耗率和更高的加工表面质量。然而,磨料辅助电化学放电复合加工方法加工MMCs也存在自身的缺陷,这种缺陷是由金属基复合材料本身的结构特点和工具电极自身的结构特点决定的,SiC增强颗粒的硬度和熔点是金属基体的几倍,而且工具电极中金刚石的硬度和熔点同时也比铜基体高很多,在加工过程中,脱落的SiC增强颗粒和金刚石颗粒难以熔化,导致排屑困难,尤其是深孔加工的时候,排屑困难的缺点体现的更加明显。因此,本文提出了一种同时结合电火花效应、电解效应和磨削效应的异形旋转磨料电极电化学放电复合加工的新方法加工金属基复合材料,旨在提高金属基复合材料的加工性能,本文的主要工作内容如下:1.提出异形旋转磨料电极电化学放电复合加工的新方法,将磨削加工方式和电化学放电加工方式（Electrochemical discharge machining,ECDM）融合到一种加工工艺中,针对加工过程中排屑困难的特点,给磨料电极设计了排屑槽的异形结构,来提高加工排屑性能;2.本文理论分析了异形旋转磨料电极电化学放电复合加工MMCs材料的材料去除原理和加工影响因素,同时分析了工具电极的损耗原理及工具电极损耗的影响因素,此外,对加工效率和电极损耗的结果进行参数化表征;3.阐述与多边形电极相比较,梅花形电极制作磨料电极的优势,为满足实际加工需求,分别设计满足实验要求的异形磨料电极和专用夹具以及搭建满足加工工况的实验平台;4.进行了异形磨料电极电化学放电加工打孔工艺试验研究,选用圆形非磨料电极、圆形磨料电极和异形磨料电极进行单因素对比实验,探索磨料粒径、峰值电流、脉宽、占空比和主轴转速对这三种电极加工MMCs材料的材料去除率（Material removal rate,MRR）和相对工具损耗率（Tool wear rate,TWR）的影响,实验结果表明,异形磨料电极具有更高的MRR和更低的TWR,在此基础上,进行了正交实验,对加工参数进行优化;此外,对加工后的碎屑以及加工后表面拍了扫描电镜进行分析,得出异形磨料电极的加工表面最光滑以及排出的碎屑颗粒分布范围最广,非磨料圆形电极的加工表面质量最差而且排出的碎屑颗粒分布范围小,这也间接验证了异形磨料电极相比较于圆形磨料电极和圆形非磨料电极,确实可以促进排屑效率的提高。

关键词：电化学放电加工异形磨料电极 MMCs MRR TWR 正交方法