安钢高线粗中轧机导卫设计特点

介绍了安钢自行设计的高线粗中轧机导卫装置的设计原则和特点。     

Si相的析出状态对Al—Si合金性能的影响

控制Si相的析出状态,会对Al-Si(1wt％)合金的性能产生不同的影响。本文阐述通过不同的热处理工艺改变了Al-Si(1wt％)合金的机械、物理性能,获得了高形变强化率、高塑性变形能力、高拉伸强度的工艺,还讨论了具有上述高拉伸强度的微细丝在半导体器件应用中所具有的优越性。     

连续式棒线材轧机孔型系统的选择

论述了连续式棒线材轧机孔型系统的种类和特点，介绍了粗轧机组和中轧机组孔型系统的选择原则和方法。     

导线物证的扫描电镜及能谱鉴定方法

对导线物证同一性的鉴定，可先用X射线能谱仪快速确定物证为同一物的必要条件，再用扫描电镜对物证的特征条纹或金相组织进行最后判定。该方法简便，可靠。     

基于金刚石薄膜的微间隙室制备

采用金刚石薄膜作为阴-阳极间绝缘介质层是一种新型的微间隙室(MGC)结构。该文详细介绍和讨论了采用常规的微细加工工艺制备基于金刚石薄膜介质层的MGC的制备技术,其典型结构为阳极微条宽20μm,微条间隔180μm,器件探测区面积为38 mm×34 mm。采用热丝CVD法制备的金刚石薄膜作为阴-阳极间绝缘介质层,厚7~8μm,具有(100)晶面结构。金刚石的刻蚀采用反应离子刻蚀,Cr作掩膜,O2和SF6为刻蚀气体,刻蚀速率为79 nm/min,与Cr的刻蚀比约为20:1。实验结果表明,采用的微加工结合自套准工艺可很好地解决金刚石薄膜的制备、图形化及金属阳极电极与金刚石薄膜的相互套准等金刚石薄膜的可加工性及兼容性问题,并制备出采用金刚石薄膜作为电极间绝缘介质层的新型MGC结构。     

Structural change in diamond by hydrogen plasma treatment at room temperature

The structural change of diamond induced by hydrogen plasma exposure at room temperature, and its thermal stability, were investigated using electron spin resonance (ESR), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) techniques. ESR observation revealed that it gave rise to a highly defective structure (spin concentration of 10²⁰ cm^{− 3}), which is very similar to the structure of hydrogenated amorphous carbon (a-C : H) confirmed by XPS and FTIR. Post-annealing was also carried out to clarify the thermal stability of the defects. The number of spin centers decreased with increasing annealing temperature, and eventually, the defective structure changed to a graphitic one by annealing at 800 °C.     

Shock-induced phase transition of oriented pyrolytic graphite to diamond at pressures up to 15 GPa

In studies of shock-induced phase transition of ordered pyrolytic graphite to a diamond-like phase, the lowest transition onset pressure was observed at 19.6 GPa. The phase transition in that case was considered to be martensitic. In the present study ordered pyrolytic graphite with voids between particles was loaded at pressures up to 15 GPa using a planar shock wave propagating along the basal plane of the graphitic crystal structure. As a result, both diamond-like carbon and diamond were observed in the postshock sample. The phase transition of graphite to diamond was assumed to occur by the release of distortional energy stored in the graphite particles, that is, diffusional-controlled reconstructive mechanism, on the basis of the data by high resolution electron microscopy together with electron energy loss spectroscopy.     

金刚石光电导探测器研制及在软X光测量中的初步应用

介绍了我们自己设计制造的天然Ⅱａ型金刚石光导探测器的结构，原理，制造工艺，实验标定及其在ＩＣＦ实验中软Ｘ光测量中的应用等。     

A Study of Surface Deformation during Wire‐Rod Rolling of High Speed Steels using Experimental and Computational Techniques

The evolution of surface defects during shape rolling of high‐speed steel billets is studied using longitudinal surface defects prepared by machining and welding. The reduction of the defects during rolling in a production mill is compared to the total area reduction of the billets. Samples are collected after pass 4, 6, 8, 14, 19 and the final pass, 28, representing the finished 5.5mm wire. By inspecting the cross sections, the rotation of the billets from pass to pass is evaluated. Results from FE simulations on solid billets are compared to the experimental results. Generally, simulations predict less reduction than observed experimentally. In most cases cracks reduce most effectively followed by carbon steel welds and stainless steel welds.     

斜井提升钢丝绳磨损“失效树”分析

介绍了引起斜井提升钢丝绳失效的各种因素 ,并建立“失效树” ,为煤矿生产中判断其失效原因及预防提供可靠依据。