【摘 要】
：
Magnetically controlled damping in 30vol%Ni-Mn-Ga/polymer composite was investigated.The orientation magnetic field did not affect the phase temperatures of Ni-Mn-Ga/ epoxy resin(EP)composites but res
【机 构】
：
School of Engineering,Hunan Institute of Engineering,Xiangtan,China;School of Material Science and E
【出 处】
：
特种粉末冶金及复合材料制备/加工第一届学术会议
论文部分内容阅读
Magnetically controlled damping in 30vol%Ni-Mn-Ga/polymer composite was investigated.The orientation magnetic field did not affect the phase temperatures of Ni-Mn-Ga/ epoxy resin(EP)composites but result in these single crystal Ni-Mn-Ga powders oriented with the easy magnetization axis (c axis).Damping properties of all composites were greater than that of pure EP at the temperature blow glass transition temperature of EP.The magnetic field while damping test enhanced obviously the damping behavior of Ni-Mn-Ga/EP, which might be the severe twin boundary motion from the competition between the magnetic field and oscillation force.The magnetic field during Ni-Mn-Ga/ EP curing exhibited less effect on the damping behavior than that of the magnetic field during test.
其他文献
对碳纳米管采用HNO3和H2SO4(体积分数1∶3)混酸纯化,并利用卧式高能球磨法制备了不同球磨时间和质量分数的碳纳米管与铝粉的复合粉末,用冷压-烧结工艺制备了CNTs/Al2024复合材料.对纯化后的碳纳米管进行XPS分析,使用扫描电子显微镜、透射电镜对复合材料的形貌进行表征;并测试了复合材料的抗拉强度、硬度.结果表明,混酸纯化除去了碳纳米管表面的杂质并引入了大量的含氧基团.当球磨时间为2.5h
The oxidation of Co-10Cr-xSi (x=0, 5, 10, nominal composition, at.%) alloys in 0.1Mpa pure O2 at 1073K was investigated.Co-10Cr presents the worst oxidation resistance with the mass gain of about 7.53
本文以Cr-Fe作为铜基粉末冶金摩擦材料中的摩擦组元,通过金相显微镜和电镜观察其微观组织,在摩擦磨损试验机MM3000上进行摩擦磨损实验,与含SiO2的铜基粉末冶金摩擦材料进行对比.结果表明:以Cr-Fe作为摩擦组元的铜基粉末冶金摩擦材料,结构上Cr-Fe与铜基体结合较为紧密,几乎没有可见的空隙.Cr-Fe含量12％(质量分数,下同)时摩擦系数最稳定,摩擦系数几乎不受摩擦速度的影响,并且磨损量也相
C/SiC复合材料在航空航天飞行器中应用的比重日益增大,并逐渐应用于前缘、控制翼等大型复杂结构,因此,C/SiC复合材料连接技术也逐渐成为C/SiC复合材料应用的研究重点.C/SiC复合材料销钉铆接技术具有连接强度可靠、热匹配良好,几乎不增加重量等优点,是C/SiC大型复杂结构最重要的连接技术之一.本文测试的C/SiC复合材料销钉采用化学气相渗透工艺(CVI)制造,销钉尺寸分别为Φ3和Φ4.5.由
采用自主研发的激光选区熔化(SLM)设备成形H13热作模具钢零件,研究了激光能量密度对材料性能的影响.研究结果表明:材料的相对致密度与激光能量密度成正比;硬度可达到国外同等材料锻件淬火后的硬度;常温拉伸强度可达到国外同等模具材料的性能,而塑性低于国家标准要求.
An in situ CeB6/Al inoculant was fabricated by arc melting technique and treated by melt-spinning at different cooling rates to improve its grain refining efficiency on pure aluminum.It has been found
本实验在自制的AAO模板上通过直流电沉积方法制备了直径较小的Fe-Co-Dy纳米线和Sm-Co/Fe-Co-Dy双相纳米线阵列.用X射线衍射仪(XRD),扫描电子显微镜(SEM),透射电子显微镜(TEM)和振动样品磁强计(VSM)表征了纳米线的晶体结构和磁性质.XRD分析表明Dy元素的加入,在纳米线中产生了新的Fe-Dy相.磁滞回线中显示外磁场平行于纳米线方向为纳米线的易磁化方向,因此纳米线具有明
The AgCuO electrical contact material was prepared by reaction synthesis method and heat treatment technology.The deformation behavior of CuO particles and its effect on the properties of AgCuO electr
本文采用溶胶-凝胶与直流电化学沉积相结合的方法制备了Fe7Co3-BaTiO3芯-管复合多铁材料,并研究了BaTiO3纳米管的形成机理、AAO模板在不同温度退火时的变化,以及磁电耦合效应对FeTCo3-BaTiO3芯-管纳米线的磁性能的影响.研究表明,根据正负电荷相互吸引,带正电的BaTi03溶胶颗粒吸附在Al2O3管壁上带负电荷部位,经750℃退火后可形成BaTiO3纳米管.AAO模板在750℃
The oxidation of Co-10Cr-xAl (x=0, 5, 10, nominal composition, at.%) alloys in 0.1Mpa pure O2 at 973K were investigated.The oxidation resistance of Co-10Cr-xAl improved greatly when the content of Al