ICP-AES法测定镍基高温合金中16个元素的方法研究

该方法采用ICP-AES法对镍基高温合金中16个元素进行了测定,系统研究了基体元素和共存元素对分析元素谱线的光谱干扰情况,进行了分析线的选择,测定了方法检出限,通过准确度试验和精密度试验,表明该方法准确、可靠、简便、快速。  

ICP-AES法测定铝合金中钪元素的方法研究

本方法采用ICP-AES法进行铝合金中Sc元素的测定,系统研究了四十余种元素对Sc三条分析谱线的光谱干扰情况,进行了分析线的选择,分别用酸溶解法和碱溶解法溶解铝合金样品,测定了方法检出限,方法回收率98％-100.3％。该方法准确、可靠、简便、快速。  

石墨炉原子吸收光谱法测定高温合金中痕量铟

本试验研究了在硫酸介质中用４－甲基戊酮－（２）萃取待测痕量元素铟的碘化物，使之与基体及主量元素分离的最佳试验条件，并对回收率及方法精密度进行了试验，所制定的方法适用于高温合金中铟的分析，试验结果准确可靠。  

Surface modification of TA2 pure titanium by low energy high current pulsed electron beam treatments

Surface integrity changes of TA2 pure titanium including surface topography, microstructure and nanohardness distribution along surface layer were investigated by different techniques of low energy high current pulsed electron beam treatments (LEHCPEBTs). The surface topography was characterized by SEM. Moreover, the TEM observation and X-ray diffraction analysis were performed to reveal the surface modification mechanism of TA2 pure titanium by LEHCPEBTs. The surface roughness was modified by electron beam treatment and the polishing mechanism was analyzed by studying the cross section microstructure of electron beam treated specimens by SEM and TEM. The results show that the surface finish obtains good polishing quality and there is no phase transformation but the dislocations by LEHCPEBT. Furthermore, the nanohardness in the surface modified layer is improved. The remelt and fine-grain microstructure of surface layer caused by LEHCPEBTs are the main polishing mechanism and the reason of modification of surface topography and the increment in nanohardness is mainly due to the dislocations and fine grains in the modified layer induced by LEHCPEBT.  

退火对AlTiN多层薄膜结构及力学性能影响

使用TiAl合金靶,利用中频反应磁控溅射系统,通过交替改变氮气流量的方法,在高速钢(W18Cr4V)基体上沉积了一组氮含量周期性改变的AlTiN多层薄膜,并分别在600,700和800 ℃下真空退火热处理. 利用X射线衍射仪、场发射扫描电镜和高分辨透射电镜等方法研究了沉积态和退火态AlTiN多层薄膜组织和微观结构;AlTiN多层薄膜的力学和膜基结合性能用纳米压痕硬度仪、摩擦磨损仪以及划痕试验仪得到. 研究表明,采用沉积过程中周期改变氮气流量的方法,可以制备出稳定的、力学性能良好的AlTiN多层薄膜. 80  

基于衍射光栅的FBG传感系统解调算法分析

研究并实现了一种基于衍射光栅的FBG解调系统,针对该解调系统从理论上分析了光纤内的模式分布,分析了由FBG引起的模式间耦合效应。根据高斯光束经过该系统后的空间光强分布,采用多项式拟合的方法实现了反射光谱峰值定位算法。通过与高精度光谱仪的测量结果对比表明,该解调方法具有较高的波长解调精度和稳定性。由于系统中不存在扫描机构,该技术可以实现较高的动态扫描频率。  

降雨对C波段散射计测风的影响及其校正

传统观点认为C波段散射计工作波长大于雨滴直径,受降雨散射衰减的影响很小, 因此往往忽略降雨对C波段散射计测风的影响.本文基于降雨引起C波段散射计信号的衰减、 后向体散射及雨滴落入海面后的扰动作用,推导了降雨条件下的雷达方程, 构建了2010年全年的ASCAT散射计、降雨雷达和欧洲中期天气预报中心数值预报的匹配数据集, 定量分析了降雨对C波段散射计测风的影响,发现其信号衰减随降雨强度和入射角的增大而增强; 后向体散射和雨表面扰动作用随降雨强度的增大而增强、随入射角的增大而减小, 其中雨表面扰动作用对散射计测风的影响大于后向体散射.另外, 利用降雨条件下的雷达方程和匹配数据集,本文建立了降雨条件下的C波段主动微波辐射传输模型, 实验表明,该模型能够改善降雨条件下C波段散射计测风的精度.  

Image analysis of atmospheric corrosion of field exposure high strength aluminium alloys

The corrosion morphology image acquisition system which can be used in the field was established. In Beijing atmospheric corrosion exposure station, the image acquisition system was used to capture the early stage corrosion morphology of five types of high strength aluminium alloy specimens. After the denoise treatment, wavelet-based image analysis method was applied to decompose the improved images and energies of sub-images were extracted as character information. Based on the variation of image energy values, the corrosion degree of aluminium alloy specimens was qualitatively and quantitatively analyzed. The conclusion was basically identical with the result based on the corrosion weight loss. This method is supposed to be effective to analysis and quantify the corrosion damage from image of field exposure aluminium alloy specimens.  

ICP-AES测定镍基焊料中的磷

通过酸溶解试验、基体共存元素干扰实验等,建立了ICP-AES测定镍基焊料中高含量磷的分析方法.样品加标回收率为100.5%-101.0%,相对标准偏差小于0.80%.该方法简便、快速、准确可靠.  

ICP-AES测定钛合金中微量钇的方法研究

本方法采用ICP-AES进行多种牌号钛合金中的0.002%-0.10%钇元素的测定.进行了分析线选择,研究了基体元素和共存元素对钇元素的干扰情况, 方法回收率100%-110% .该法比较简便、快速、准确.