Basic principles and application potentials of cold gas spraying
Basic principles and application potentials of cold gas spraying
复制标题
冷气体喷涂的基本原理及应用潜力
DOI：
10.1002/mawe.201000645
复制
发表时间：
2010
影响因子：
1.1
通讯作者：
H. Kreye
中科院分区：
文献类型：
--
作者：
T. Klassen;F. Gärtner;T. Schmidt;J.;K. Onizawa;K.;H. Gutzmann;K. Binder;H. Kreye
冷喷涂是一种成熟的涂层技术，适用于多种材料和应用。致密微观结构的形成仅通过以足够高的动能撞击基材的颗粒的塑性变形发生。有限的热影响远低于相应喷涂材料的熔化温度和非常短的时间尺度使该方法适用于热敏材料。为了获得最佳喷涂条件和涂层性能，需要全面了解冷喷涂工艺和结合机理。本文总结了目前基于绝热剪切不稳定性的涂层形成模型。计算机模拟可视化键合过程，并允许提取定义“沉积窗口”的关键参数。对于选定的材料，粉末特性，颗粒的影响条件和涂层性能之间的相关性。此外，喷涂设备的最新技术进行了审查。特别强调的是最近的改进，确保更好的涂层性能和扩大范围的喷涂材料。最后，不同的应用实例来阐明各种涂层和基材材料的潜力。
Cold spraying is a well‐established coating technology for several materials and applications. The formation of dense microstructures occurs only by the plastic deformation of particles hitting the substrate with sufficiently high kinetic energies. Limited thermal influences well below the melting temperatures of respective spray materials and very short time scales make the process suitable for heat sensitive materials. For optimum spraying conditions and coating performance, a comprehensive understanding of the cold spray process and bonding mechanisms is required. This presentation summarizes the current model for coating formation based on adiabatic shear instabilities. Computer simulations visualize the bonding process and allow for extracting critical parameters that define the “window of deposition”. For selected materials, a correlation between powder characteristics, particle impact conditions and coating properties is shown. Furthermore, the state of the art in spraying equipment is reviewed. Special emphasis is put on recent improvements that ensure better coating performance and widen the range of sprayable materials. Finally, different application examples are presented to elucidate the potential for a variety of coating and substrate materials.