Coat of Arctic Fox (Alopex lagopus L.) of Different Genetic Groups in Micro- and Macroscopic Studies and in DSC Investigations

The objective of this research project was to compare in different genetic groups of arctic foxes the composition of the coat, hair length, and thickness as well as the medulla of four hair types but, primarily, to investigate the hair of the two layers of the coat hair (the underhair and the overcoat) using, for this purpose, the differential scanning calorimetry (DSC) method. Generally speaking, Finnish foxes were characterized by the most favorable indices of these traits. Different proportions of genes exerted a different impact on the level of these traits.     

丙烯酸环氧树脂高耐候环保型阴极电泳涂料的研究

以自制阳离子型丙烯酸环氧树脂、颜填料、纳米级紫外线吸收剂和光屏蔽剂为原料,研制LH-3001A丙烯酸环氧型阴极电泳涂料,该涂料具有良好的户外耐老化性和耐盐雾性,可作为底面合一涂料用于汽车、机械、重工等行业。     

Thermal fatigue behavior of thermal barrier coatings with the MCrAlY bond coats by cold spraying and low-pressure plasma spraying

The thermal fatigue behavior of thermal barrier coatings (TBCs) with the NiCoCrAlTaY bond coats deposited by cold spraying and low-pressure plasma spraying (LPPS) was examined through thermal cyclic test. The TBCs were subjected to the pre-oxidation before the test in an Ar atmosphere. The results show that a more uniform TGO in both thickness and composition forms on the cold-sprayed bond coat than that deposited by LPPS. The TBCs with the cold-sprayed bond coat exhibit a longer thermal cyclic lifetime than that with the LPPS bond coat. The differences in oxidation behavior and thermal cyclic behavior between two TBCs were discussed based on the evident difference in the surface morphology of two MCrAlY bond coats deposited by cold spraying and LPPS.     

热处理工艺参数对2A12铝合金镍磷镀层性能的影响

研究了2A12铝合金表面镍磷合金镀层的性能及热处理温度对镀层硬度、耐磨性、磨损速率等的影响.     

制备工艺参数对抗菌胶衣树脂抗菌性能的影响

本文以硅溶胶为载体,通过负载金属银离子、TiO2、ZnO以及A l2(S iO3)3于硅溶胶中,制备了复合无机抗菌剂,并将其加入到胶衣树脂中制备了抗菌胶衣树脂。主要研究了抗菌剂的制备参数、含量及种类和抗菌胶衣树脂的制备参数对胶衣树脂抗菌性能的影响。实验结果表明,随着烧结温度的升高,抗菌胶衣树脂的抗菌率呈现先升高后降低的趋势,烧结温度为1000℃时抗菌胶衣树脂的抗菌率最高;随着球磨时间的延长,抗菌胶衣树脂的抗菌率呈上升趋势,球磨时间大于6h时抗菌率增加的幅度减小;随着苯乙烯含量的增加,其抗菌率也逐渐增加,苯乙烯含量为10m l时抗菌率达94%;随搅拌时间的延长,抗菌胶衣树脂的抗菌率也有所增加,搅拌时间为1h时抗菌率为94%。     

粉煤灰在处理洗煤废水过程中的应用

研究了利用粉煤灰和硫铁矿烧渣制备无机高分子混凝剂的工艺条件,以及用制得的混凝剂处理洗煤废水。实验结果表明：出水水质良好,并可回收大量的煤炭资源。     

水性环氧防腐蚀涂料

综述了水性环氧防腐蚀涂料,包括各类底涂、中涂、面涂防腐漆的国内外发展状况,介绍了它的实际应用情况。     

Life time dependency on the pre-coating treatment of a thermal barrier coating under thermal cycling

A thermal barrier coating system consisting of the single crystalline Ni-based superalloy CMSX 4, a Pt aluminide bond coat and an EB-PVD processed ceramic top coat was thermally cycled in order to study the influence of three different treatments prior the deposition of the ceramic top coat. Besides the standard treatment, one type of treatment was annealing in vacuum, while the other was annealing in an O containing ArH atmosphere; in both cases for 4 h at 1080 °C.Compared to the standard treatment, annealing in vacuum almost doubled and annealing in ArH atmosphere almost tripled the cyclic life time of the ceramic coating. The improvement was related to the creation of a defined alumina scale before and during TBC deposition.     

Influence of bond coat on shear adhesion strength of erosion and thermal resistant coating for carbon fiber reinforced thermosetting polyimide

Arc-sprayed Al, Zn, and plasma-sprayed Al, Zn, Ni3Al and Cu were deposited on carbon fiber reinforced polyimide substrate as bond coats for erosion and thermal resistant coating. Shear adhesion strength of different materials was tested, and microstructures of bond coats were analyzed with scanning electron microscope. The results showed that the substrate was thermally damaged when Ni3Al or Cu was deposited as bond coat, and the bond coat was delaminated from the substrate. Arc-sprayed and plasma-sprayed Al and Zn could be used as bond coat materials. For Zn as bond coat material, depositing method had little influence on shear adhesion strength. While for Al as bond coat material, plasma spray was superior to arc spray. Preheating could improve shear adhesion strength with plasma sprayed Al as bond coat. The maximum shear adhesion strength obtained in this paper was 14.15 MPa, with plasma-sprayed Al as bond coat, and the preheating temperature was 250 °C.     

镀锌层与氟碳漆涂层的相容性研究

在部分产品中,钢表面镀锌后表面再涂一层漆,其目的是为了增加耐腐蚀性能。但是锌可能会与漆层中的一些组份发生反应,降低漆膜性能。本文通过开展氟碳漆涂层和镀锌层湿热试验后性能测试研究,表明两者之间具有较好的相容性,可提高产品的防护性能。