一种新的去除硬质合金表面涂层的方法研究

采用NaOH熔融混合液对废旧硬质合金表面涂层的去除进行研究。目测观察试样表面颜色变化,扫描电镜分析微观表面形貌,并通过能谱仪分析涂层表面成分。分别讨论了熔液温度与保温时间对涂层的去除效果、回收基体质量的影响。实验表明,NaOH熔融混合液可以有效地去除涂层硬质合金的表面涂层物,在700℃、40min条件下能够得到最佳去涂层效果,而不损害基体。     

抗旱型种衣剂包衣冬小麦的节水增产效果研究

在室内培养和大田栽培条件下研究了冬小麦使用抗旱型种衣剂包衣处理的节水增产效果。结果表明 :在沿淮淮北秋旱情况下 ,用抗旱型种衣剂 1 、2 #、3#、4#包衣对小麦萌发出苗、产量和WVE有明显的促进作用 ,与对照相比 ,出苗期提前 1 .5～ 2 .5天 ,出苗率提高 6 .0～ 1 0 .0个百分点 ,产量提高 7.1～ 1 1 .6 % ,WVE提高 7.5～ 1 1 .9% ,其中以 4#种衣剂包衣处理的节水增产效果最好     

壳聚糖多孔支架电化学辅助沉积羟基磷灰石涂层研究

采用电化学辅助技术控制阴、阳两极溶液中的钙、磷离子定向迁移,进入壳聚糖多孔支架内部发生反应并在孔隙表面沉积,制备了有机-无机复合多孔支架.应用XRD、SEM、煅烧法、孔隙率测定和压缩实验对支架的组成、形貌、无机物沉积量、孔隙率以及压缩强度进行了表征.研究表明,处理后支架孔隙表面沉积了低结晶度的羟基磷灰石,低倍下沉积层均匀致密,在高的放大倍数下发现,沉积层中存在大量的微孔,沉积层表面存在着球状物,该球状物是由许多小片组成的.沉积6 h时沉积量为支架质量的2.81%,支架孔隙率由96.0%减少到89.8%.与纯壳聚糖支架相比,复合支架的压缩强度由0.0550 MPa提高到0.0998 MPa.     

STANNO Metal 9000型镀锡量分析仪故障诊断与处理

介绍了STANNO Metal 9000型镀锡量分析仪的工作原理,并对在使用过程出现的仪器自测无法通过、电位检测异常以及电解槽等故障进行了分析,并提出了处理措施。     

A method for predicting critical load evaluating adhesion of coatings in scratch testing

In this paper based on the experiment principle of evaluating adhesion property by scratch testing, the peeling mechanism of thin films is discussed by applying contact theory and surface physics theory. A mathematical model predicting the critical load is proposed for calculating critical load as determined by scratch testing. The factors for correctly evaluating adhesion of coatings according to the experimental data are discussed.     

氟碳涂料在新建矿区的应用

本文介绍了氟碳涂料的发展、基本性能,生产概况、开发和新进展,对氟碳涂料在新建矿区外墙上使用的具体方案进行了选择,并对氟碳涂料使用的总体效果进行了评价。     

A method for predicting critical load evaluating adhesion of coatings in scratch testing

INTRODUCTIONHardceramicfilmsdepositedbychemicalva pordeposition (CVD)andphysicalvapordeposi tion (PVD)techniqueshadbeenwidelyappliedinindustry .Coatingadhesionisaveryimportantpropertyforevaluatingthecoatingquality.Themethodevaluatingtheadhesionstrengthoft…     

Inverse method for the determination of elastic properties of coating layers by the surface ultrasonic waves

INTRODUCTION The elastic properties of coating layers in coating materials are very important in the design and evaluation for engineering purpose. They can serve as ground knowledge in the selection of surface coatings for particular applications, and can be used to monitor the quality of physical processes (Every, 2002). Therefore, estimation of the elastic properties of coating layers is of great practical value. Much effort has been put into measuring the material properties of coatin…     

外墙涂料基料—硅丙乳液的制备及表征

以丙烯酸丁酯、甲基丙烯酸甲酯、八甲基环四硅氧烷为单体,通过乳液聚合制得了有机硅-丙烯酸酯共聚物,探讨了影响乳液性能的因素,确定了乳液聚合的最佳反应条件.