Microstructure of ternary Zn1-xCdxO films on silicon substrate

Ternary Zn1-x CdxO alloying films were deposited on silicon substrates by a reactive magnetron sputtering method. The structures of the films were characterized by transmission electron microscopy(TEM) and X-ray diffraction(XRD) analysis, respectively. The XRD measurement shows that the wurtzite-type structure of Zn1-xCdxO can be stabilized up to Cd content of x=0.53 without a cubic CdO phase separation. The TEM measurement shows that the films have a columnar structure and the grains are highly c-axis oriented perpendicularly on silicon substrate although some grain boundaries are slightly tilted. High resolution TEM observation indicates that a native layer of amorphous SiO2 exists at the ZnCdO/Si interface and that ZnCdO grains with c-axis preferred orientation nucleate directly on substrate surface.     

基于机器视觉的轴承尺寸检测

本文采用机器视觉和图象处理技术，利用CCD摄象机、图象采集卡、运动控制卡、计算机等组成一针对轴承外形尺寸的视觉检测系统，介绍了系统的组成和图象处理方法，并给出了系统的硬件和软件设计。     

Creep behavior and microstructure evolution of directionally solidified superalloy IC 10 at high temperature

The creep behavior of directionally solidified （DS） superalloy IC 10 was investigated under 192 MPa and 218 MPa at 980 ℃. Under the testing conditions, the marked creep characteristic of the superalloy is that the creep curve has a short primary and secondary stage and a long tertiary stage. Another creep characteristic is that the superalloy has excellent plasticity at high temperature. To study the creep behavior, the microstructure was observed by SEM and TEM. Different from other microstructure of Ni-base superalloys, superalloy IC10 forms incompletely rafted γ＇ phase during the creep processes. To understand the creep deformation mechanism of superalloy IC10, the movement of dislocations was analyzed. The results show that the dislocations moving in the γ matrix and climbing over the γ＇ precipitates is the main deformation mechanism under the experimental conditions.     

超精密传动系统电机驱动器系统性能测试

文章介绍了基于扭轮摩擦传动机构的超精密传动系统的基本结构,设计并分析了电机驱动器测试系统及其工作原理,论述了电机-驱动器系统静态性能和动态性能的测试原理和评估方法.在静态条件下可以直接比较输入和输出数值,在动态条件下应排除时滞影响,分析输出和输入数值的随机偏差.分析了静态性能和动态性能的评估方法和评价条件公式,并在所设计的测试系统上对电机驱动器系统进行了测试,根据实验数据得出该系统静态和动态性能优良的结论并测量了电机-驱动器系统的滞后时间常数.     

冷摆辗模具的失效分析与Cr12型钢热处理工艺

对冷摆辗模具进行失效分析，介绍常用的冷摆辗模具材料Cr12型钢的热处理工艺。     

Cr12MoV模具钢的激光熔覆

利用不同的激光工艺参数对Cr12MoV模具钢表面进行熔覆试验，探讨了熔覆层裂纹和气孔产生的趋势和工艺参数对熔覆层深度的影响，研究了表面微观硬度的分布及其原因、熔覆层耐磨性能的提高幅度以及组织结构的变化。结果表明，采取适当工艺措施，可以完全消除熔覆层的气孔，减少横向裂纹；表面硬度在不同程度上都得到提高，硬度峰值出现在次表层；激光熔覆层的耐磨性能可以提高47％－76％；微观结构是由平面晶和枝晶构成的共晶组织，并有多种合金相分布在枝晶间。     

基于PC机和80C196单片机的温度微机控制系统

文章介绍了由PC机和80C196单片机构成的热处理温度微机控制系统,并就集中温度数据采集方法、PC机和单片机的数据通信格式、单片机软硬件设计、双向晶闸管的触发电路等相关技术进行了分析,给出了串行通信中断接收及数据处理程序设计流程图.     

高强铝合金沿晶断裂声发射研究

高强度铝合金沿晶界断裂过程中的声发射信号特征反映了材料沿轧制方向的宏观性能。在带有预制裂纹的双悬臂梁(DCB)试样中，裂纹失稳扩展前，先有一短距离的韧窝状穿晶撕裂的稳态裂纹扩展。稳态裂纹扩展起始于K1C并发射出许多幅值超过阈值35dB的信号。当稳态裂纹扩展至Kmax时，便出现失稳的沿晶开裂。对稳态及失稳的裂纹扩展两种情况，其累计声发射能量均与宏观断裂能呈线性关系。     

梅雨季节制动鼓气孔的产生及预防措施

梅雨季节高温潮湿天气对冲天炉熔炼带来不利影响,导致铸件气孔缺陷增加。采用调整冲天炉风量和炉料比例,提高型(芯)砂透气性及加强炉前脱气处理等措施,取得了明显效果。     

数字化点焊控制系统中人机接口的设计

采用自制键盘和液晶显示器（LCD），在数字化点焊控制系统中实现了简便、直观地设置点焊规范参数的人机接口，并给出了详细的软、硬件设计方案，实验结果表明：电路工作可靠，实现了设计目标。