Reactive thermal spray by high velocity ceramic jet and characterization of the coatings
Reactive thermal spray by high velocity ceramic jet and characterization of the coatings
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DOI：
10.1361/105996399770350223
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发表时间：
1999-12-01
影响因子：
3.1
通讯作者：
Tamura, H
中科院分区：
文献类型：
--
作者：
Kodama, T;Ikeda, Y;Tamura, H
采用闪光软X射线照相技术，对电热爆炸粉末喷雾中熔融颗粒组成的陶瓷射流进行了鉴定。喷流前缘的速度估计为900毫秒。由二硼化钛陶瓷射流获得的涂层由基材和喷涂陶瓷的混合层组成。通过喷雾液滴的致密沉积和凝固，形成了无气孔和裂纹的涂层。液滴的连续撞击导致基片表面的熔化和搅拌形成混合层。这些层中的一些是由于熔融的衬底材料进入粗陶瓷颗粒的断裂中的毛细运动而形成的。钛和氮化硼颗粒之间的化学反应热喷涂形成了TiN和TiB2的复合涂层。混合层的特性表明，混合层的深度分布与衬底材料有关。
A ceramic jet composed of molten particles in an electrothermally exploded powder spray was identified by the flash, soft x-ray radiography technique. The velocity of the leading edge of the jet was estimated to be 900 mis. The coating obtained by a ceramic jet of titanium diboride consisted of a mixing layer of the substrate material and sprayed ceramics. A coating, which exhibited no pores or cracks, was formed through the dense deposition and solidification of spray droplets. The successive impacts of the droplets caused melting and stirring of the substrate surface to form a mixing layer. Some of these layers were formed due to capillary movement of the molten substrate material into the fractures of coarse ceramic particles. Thermal spray by chemical reaction between titanium and boron nitride particles resulted in a composite coating of TiN and TiB2. The character of the mixing layer indicated that the depth profiles depended on the substrate material.