液相等离子沉积非晶态碳膜的试验研究

应用简单的电镀槽，通过阴极/电解液界面前沿气泡鞘的形成而建立辉光放电，促成非晶态碳薄膜在电极表面的沉积。沉积物宏观上分布不均匀，在阴极浸入电解液的末端，由于电流的尖端效应，导致生成物为石墨。而远离末端为正常沉积区，表面平整光滑，生成物为非。晶态碳膜。结论：液相等离子沉积行为可发生在辉光放电条件下的阴极过程，从而可应用于非晶态薄膜如非晶态碳的制备。     

退火温度对Nd2Fel4B／α—Fe磁性多层膜中相形成的影响

通过TEM和HRTEM对比研究了软磁层厚度为2．5nm的Nd2Fe14B／α—Fe型多层膜的显微结构．结果表明，在退火前的多层膜中Fe层为多晶，硬磁相以非晶的状态存在；在600℃以上退火后软磁层消失，生成的Nd2Fe14B型相被固定在硬磁层内；625℃退火后发现有Nd2Fe17相在硬磁层中析出，表明在多层膜退火过程中，退火温度对相转变的影响比退火时间的影响更大．Nd2Fe17相的析出可能是高温退火后磁性能下降的主要原因．     

Zr对非晶Co-Si薄膜晶化和相变的影响

利用X射线衍射分析技术结合差示扫描量热仪,研究了Zr在Co-Si合金非晶薄膜晶化和相变过程中的作用.结果表明:溅射态非晶Co-Si薄膜和Co-Si-Zr薄膜在加热到950℃的过程中,均主要析出Co-Si和Co-Si2两种晶化相;Zr的加入增大了晶化激活能,抑制了晶化相的形核和长大,使薄膜能够在更高的温度范围保持稳定,但在高温800℃以上加热时,却使晶化相Co-Si向Co-Si2的转变加快.     

Overview of the amorphous precursor phase strategy in biomineralization

It was assumed for a long time that organisms produce minerals directly from a saturated solution. A few exceptions were known, including the well documented mineralized teeth of the chiton. In 1997 it was demon-strated that sea urchin larvae form their calcitic spicules by first depositing a highly unstable mineral phase called amorphous calcium carbonate. This strategy has since been shown to be used by animals from other phyla and for both aragonite and calcite. Recent evidence shows that vertebrate bone mineral may also be formed via a precursor phase of amorphous calcium carbonate. This strategy thus appears to be widespread. The challenge now is to understand the mechanisms by which these unstable phases are initially formed, how they are temporarily stabilized and how they are destabilized and transform into a crystalline mature product.     

张应力对FeCoSiB非晶薄膜磁特性的影响

采用磁控溅射方法,在弯曲的玻璃基片上制备出受张应力作用的FeCoSiB非晶薄膜,研究了张应力大小对FeCoSiB薄膜的磁畴、矫顽力、剩磁、各向异性场等磁特性的影响.结果表明,薄膜的畴结构显著依赖于张应力,其磁畴宽度随张应力增加而增加;张应力导致FeCoSiB薄膜内形成较强的磁各向异性,其各向异性随应力的增大而增大.     

V部分替代Nb对含Co FINEMET型合金磁性的影响

研究了含Co的Finemet型（Fe.．5Co0．5）73．5Nb3Si13．5B9Cu1和（Fe0.5Co0．5）73．5Nb2V1Si13．5B9Cu1合金在不同温度纳米晶化后的磁性．结果表明,用V部分替代Nb对淬态（Fe0.5Co0．5）73．5Nb2V1Si13.5B9Cu1非晶合金的居里温度没有明显的影响,但是形成（Fe0．5Co0．5）7a．5Nb2V1Si13．589Cu1纳米晶合金使剩余非晶中Co的含量降低,导致初始磁导率在高温下快速衰减;用V部分替代Nb使（Fe0．5Co0.5）73．5Nb2ViSi13．5B9Cu1纳米晶合金中的晶体相含有更多的Co,增大了材料的饱和磁感应强度B8并显著提高了初始磁导率．     

影响BiSrCaCuO110K相高温超导薄膜生长的因素

本文综述了后处理及原位生长ＢｉＣｒＣｕＯ高潮温超导薄膜的主要进展，重点讨论了影响１１０Ｋ相生长速率的工艺因素及提高Ｂｉ系高温超导薄膜质量的可能方法。     

沉积条件对硅基薄膜非晶转微晶相变、沉积速率及其光电性能的影响(英文)

本文采用HWA-MWECR-CVD系统制备了微晶硅薄膜。研究了氢稀释比、反应压强以及微波功率对微晶硅薄膜非晶转微晶相变及其相关性能的影响。实验结果表明:当氢稀释比为94%、反应压强为1.5Pa以及微波功率为500W时,高质量的微晶硅薄膜可以被获得,如2.86*104的高光敏性,1nm左右的沉积速率以及8.9%的光致衰退速率等。     

Concurrent multiscale modeling of amorphous materials in 3D

A general three‐dimensional concurrent multiscale modeling approach is developed for amorphous materials. The material is first constructed as a tessellation of hexahedral amorphous cells. For regions of linear deformation, the number of degrees of freedom is reduced by computing the displacements of the vertices of the amorphous cells only instead of the atoms within. This is achieved by determining, a priori, the atom displacements within such pseudoamorphous cells associated with orthogonal deformation modes of the cell. Actual atom displacements are calculated using traditional molecular mechanics for regions of nonlinear deformation. Computational implementation of the coupling between pseudoamorphous cells and molecular mechanics regions and stiffness matrix formulation are elucidated. Multiscale simulations of nanoindentation on polymer and crystalline substrates show good agreement with pure molecular mechanics simulations. Copyright © 2012 John Wiley & Sons, Ltd.     

非晶软磁合金的巨磁阻抗效应及应用

近来在ＦｅＣｏＳｉＢ等Ｃｏ基非晶体丝带中现了巨磁阻抗效应，由于在一小的直流纵向偏置场下该效应能使丝带两端的交流电压发生大而灵敏的变化，因而在磁记录头和传顺技术中具有巨大的应用科学潜能，受到各国学者的关注，本文简单介绍了巨磁阻抗效应的来源，并综述了近年来非晶体软磁合金材料的的巨磁阻抗效应及应用的研究进展，文章最后说明了尚待深入解决的问题。