The results indicate that it has an excellent surface . aln thin film was prepared from an aluminum target by dc and af reactive magnetron sputtering in nitrogen gas mixed with argon gas 氮化铝薄膜样品是利用高纯铝靶,在氮气加氩气气氛下用直流和射频反应磁控溅射法制备的。
The gemstones in the corundum group consist of pure aluminium oxide which crystallised into wonderful gemstones a long time ago as a result of pressure and heat at a great depth 蓝宝石的矿物名称为刚玉，其纯铝氧化物，是在久远以前被地层底下的压力和热度结晶化，转换为美丽灿烂的宝石。纯刚玉是无色的。
We are jiangiyn haida group co . , ltd , the large - scale manufacturer of construction materials and synthetic leather in china . with total investment of 50 million usd jiangyin haida grooup now possess four core enterprises as below 江阴海达集团位于中国经济发达的长江三角洲，交通便利。是专业生产铝塑板铝型材纯铝板和人造革的规模企业。
Pure re ( cerium , lanthanum ) have certain improvement effect on the conductivity of pure aluminum with relatively high impurity contents in some degree of addition , but had a slight effect on that with relatively low impurity content 单独加稀土铈或镧对杂质含量高的纯铝的导电性在一定的添加范围内有一定的改善，而对杂质含量较低的纯铝的导电性略有改善。
Nanometer pore arrays alumina films were prepared by anodizing of highly pure aluminum foils in sulfuric and oxalic acid solution . the porous alumina layers were detached from the al substrate by using step - down voltage or solution method 在草酸和硫酸溶液中，通过阳极氧化高纯铝片的方法制备了纳米氧化铝膜孔阵列，用阶梯降压法或溶解法将氧化铝膜层和铝基底分离。
Special for cob bonding wire al si fine wire fine gold lead bonding wire and electronics manufacturing service , have been evaluated vendor for motorola . imported equipment and material from usa , uk , germany and japan . advanced process under clean room environment 主要开发和生产cob邦定铝线led键合金线高纯铝线fine bonding wire ，同时提供电子产品委托生产服务ems ，是motorola公司的正式供货商。
Electrolytic low content titanium aluminum alloy and electrolytic al - si - ti alloy are two new alloy materials produced by new technique of production . it ' ll have very important practical value and referential significance in evaluating the properties of the two new materials and generalizing the new technique of production in industry to study and compare the fatigue properties and relevant mechanical properties of the applied cast alloys made from them and pure aluminum comprehensively 电解低钛铝合金和电解铝硅钛合金是两种新型工艺生产的铝合金，对以二者和纯铝为基本原料制备的应用铸造合金的力学疲劳性能进行综合的对比研究，将会对客观评价这两种新材料的性能、在工业生产上推广新工艺，具有非常重要的现实意义和参考价值。
Thermodynamic couple numerical simulation of ring compression of pure aluminum and tube extrusion of superalloy gh4169 is done by adopting the constant friction model and the present friction model in the paper . numerical results are compared with experimental investigations to validate the correction and nicety of the present friction model of bulk metal forming processes . the accuracy of the finite element simulation of bulk forming processes can be improved by adopting the present friction model 采用二次开发msc . superform软件,对纯铝圆环镦粗和高温合金gh4169管材挤压过程进行了热力耦合数值模拟,比较了采用本文提出的多因素摩擦模型和常摩擦模型对圆环镦粗和管材挤压过程变形行为的影响,通过与实验结果的比较,验证了本文的摩擦模型及其参数值的正确性,也说明了多因素摩擦模型提高了有限元模拟的精度。
Too much oxygen content in the atmosphere will oxide the boron carbide surface , the infiltration will not occur . at too low too low infiltration temperature , the wettability between the boron carbide and aluminum are so poor that the infiltration will not occur too . all kinds of aluminum alloy in this study infiltrate the boron carbide preform , but the pure aluminum infiltrated the preform most completely 气氛中的氧分压过高，碳化硼表面被氧化，浸渗无法进行；浸渗温度过低，碳化硼与铝之间不能达到良好润湿，浸渗也无法进行；在本文实验条件下，几种铝合金都可以与碳化硼复合，但复合效果不同，其中以纯铝l4的复合效果最佳。
In the present dissertation , five commercial metallic materials ? tungsten alloy ( 93w ) , oxygen free copper ( ofc ) , titanium alloy ( tc - t ) , pure aluminum ( al ) and magnesium alloy ( mb2 ) were chosen as the composite system of the flier - plate with graded wave impedance , and their acoustic and mechanical parameters were measured . the thickness of each material was controlled so that flier - plates with a parabolic or cubic wave impedance distribution were designed 依据实现准等熵压缩和超高速发射对梯度飞片体系的理论要求，论文首先在一个较宽的波阻抗变化范围内，确定钨合金( 93w ) 、无氧铜( ofc ) 、钛合金( tc _ 4 ) 、工业纯铝( al )和镁合金( mb _ 2 )五种综合性能良好的金属和合金材料作为波阻抗梯度飞片的复合体系，并测量了材料的相关声学和力学参量。
