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用等离子体增强化学气相沉积制备微晶硅薄膜
材料合成与加工工艺 微晶硅薄膜 Ar稀释SiH4 ECR--PECVD 微波功率
2010/9/5
以Ar+SiH4作为反应气体, 用电子回旋共振等离子体化学气相沉积(ECR--PECVD)方法制备微晶硅薄膜, 研究了微波功率对薄膜中H含量、薄膜的沉积速率、择优取向和结晶度的影响。结果表明, 在300℃制备低温微晶硅薄膜, 随着微波功率的增大, 薄膜的沉积速率先增大后减小, 微波功率为600 W时达到最大; 而结晶度和薄膜中的H含量则分别呈现单调增大和单调减少的趋势; 使用不同的微波功率, 薄膜...
提高6063铝合金表面耐蚀性能的途径研究
铝合金 腐蚀性能 组织处理 挤压工艺
2010/9/1
研究了提高6063铝合金表面耐蚀性能的途径，并从理论上分析了改善耐蚀性能的作用机理 结果表明: 合理调整合金的化学成分有利于提高材料的耐蚀性能，Mg，Si 元素的质量比值在1．55附近时性能较佳; 对铸锭进行必要的均匀化处理有助于型材耐蚀性能的提高，均匀化后铸锭适宜采取快速冷却; 挤压工艺对材料的腐蚀性能有重要影响，型材的出口温度在510℃左右时具有较好的耐蚀性能。
含氟联苯乙炔类液晶的合成
含氟液晶 二苯乙炔 Sonogashira 反应
2010/8/20
丁基溴苯和间氟苯硼酸经Suzuki偶联生成4'丁基-3-氟联苯,4'丁基-3-氟联苯在低温下碘代生成3-氟-4-碘-4'-丁基联苯,3-氟-4-碘-4'-丁基联苯与5种取代苯乙炔发生Sonogashira反应生成5种含氟联苯炔类单体液晶。进行了产品结构的标定以及参数的测定,确定了化合物具有较大的光学各向异性(Δn)和较宽的向列相范围。
光反应型LCD间隙控制材料的研制
液晶盒厚 光反应型间隙控制材料 紫外光固化
2010/8/20
采用丙烯酸类单体以及各种功能性配合物制备了光反应型高分子树脂,该材料分子结构中具有可提高对ITO金属膜附着力的羟基基团,还具有能提高耐热性的苯环骨架结构。对其光敏性进行了测试,确定该材料具有快速固化的特点。通过对该材料的透光率、耐热性能的详细测试与比对,确定了该材料具有高透光率以及高耐热性能的特点,铅笔硬度测试结果在3H以上,表明该材料可作为LCD间隙控制材料使用。
Strengthening surfaces of machine components by treatment using loose solid balls
Strengthening surfaces machine components treatment loose solid balls
2010/8/12
A requirement in the effective and cheap methods of treatment of metallic machine parts with the complicated configuration grew along with development of production and creation of enterprises in mach...
制备Mg--3Sn--Mn合金型材, 研究了连续流变成形工艺条件对制品组织的影响机理。结果表明: 当轧辊转速一定而合金浇注温度在690--750℃变化时, 随着浇注温度的降低, 结晶前沿的成分过冷度增大, 合金中心固相率增加, 从而使制品边部柱状晶区增大, 中心等轴晶区减小, 等轴晶区的晶粒平均直径减小。当合金浇注温度一定, 二轧辊转速在0.052--0.087 m · s -1变化时, 随着轧辊...
用脉冲电沉积技术制备Ni镀层, 研究了脉冲周期和糖精添加剂对其微观结构的影响。结果表明, 采用单向脉冲电沉积时, 增大脉冲周期可制备出生长取向更均匀、表面更平整且晶粒尺寸更小的纳米晶Ni镀层; 在镀液中加入糖精可降低镀层中的张应力, 从而避免镀层开裂, 且可明显细化镀层的晶粒尺寸; 采用正反脉冲电沉积时, 随着反向脉冲周期的增大, 镀层的晶粒先沿<200>方向择优生长, 而后转变为沿<111>、<...
在非线性数值算法基础上,采用水平集方程、动量方程与能量方程进行多物理场全耦合计算的方法,对非对称几何板件的注射-压缩成型过程进行了模拟分析。结果表明,注射-压缩工艺较传统注射工艺能够显著降低制成件收缩率;成型过程中熔体的纤维流线长度与温度变化会对制件收缩率产生影响。较短的纤维流线,较均匀的温度分布能够获得更小、更均匀的收缩率。
Aspects of improving the organisation directed to the quality
Industrial management and organization Quality management Analytical model of the quality evaluation of the business administration Quality indicator of organization
2010/6/2
We can define the organization as socio-technological unit composed of persons which aim at achieving determined purposes. It requires combining joint efforts of employees and the employer, in other w...
Application of artificial neural networks in modelling of quenched and tempered structural steels mechanical properties
artificial neural networks modelling quenched structural steels
2010/5/12
The material mechanical properties prediction possibility is valuable for manufacturers and design engineers. That is why over one year ago, in [1] modelling results of normalised
structural steels m...
Microstructure forming processes of the 26Mn-3Si-3Al-Nb-Ti steel during hot-working conditions
Microstructure forming processes 26Mn-3Si-3Al-Nb-Ti steel hot-working conditions
2010/5/12
In the last few years attention of automotive industry is focused on modern high-strength steels, which allow to decrease the weight of different elements of vehicles, what is directly connected with ...
AgSnBi powder consolidated by composite mode of deformation
AgSnBi powder consolidated composite deformation
2010/4/12
Owing to their high electrical and thermal conductivities, high resistance to arcing, high welding adhesion resistance, low contact resistance, high hardness and strength, silver metal oxides (Ag/MeO)...
Constructional model of internal oesophageal prosthesis
Oesophagus prostheses Oesophagus cancer Composites Engineering polymers Biomaterials Aramid Silicone Application
2010/4/2
Basic indications for the application of the prostheses of the upper part of digestive system are contractions, injures or tumours. The oesophageal cancer is the most frequently observed. Sarcomas, ly...
Computer models of steam pipeline components in the evaluation of their local strength
Computer models steam pipeline components evaluation local strength
2010/3/12
The issue of durability of power engineering devices is more and more often the object of interest for not only their users but also scientific centres dealing with the issues of creep, fatigue and cr...
Experimental and numerical studies of MR damper with prototype magnetorheological fluid
Experimental numerical studies MR damper prototype magnetorheological fluid
2010/3/12
Magnetorheological fluids belong to a group of non-Newtonian fluids, i.e. such that do not meet Newton’s law of fluid friction (the kinetic viscosity coefficient is variable). They also repr...