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为改善溅射依涂层与钼基体之间的结合力,在钼基体与依涂层之间制备了钨粘结层,并成功在钼丝网上制备了双层的铱/钨涂层。研究表明,钨粘结层的制备能有效改善铱涂层与钼基体之间的结合力,从而有效抑制铱涂层的剥落。对于制备态的样品,W粘结层与铱涂层以及钼基体之间未出现明显的互扩散。X射线衍射结果表明,溅射铱涂层为多晶结构且呈(111)择优取向生长。根据Movchan-Demchishin模型,所制备的双层铱/钨涂层的显微结构与“1区”结构类似,该结构表明所制备的涂层横向结合力弱,在拉应力状态下易发生开裂。
In order to improve the bonding between the coating and the molybdenum matrix, a tungsten bonding layer was prepared between the molybdenum matrix and the coating, and a double-layer iridium / tungsten coating was successfully fabricated on the molybdenum mesh. Studies have shown that the preparation of tungsten adhesive layer can effectively improve the adhesion between the iridium coating and the molybdenum matrix, thereby effectively inhibiting the iridium coating flaking. For the prepared samples, no significant interdiffusion was observed between the W tie layer and the iridium coating and the molybdenum substrate. X-ray diffraction results show that the sputtered iridium coating is polycrystalline and grows in the (111) preferred orientation. According to the Movchan-Demchishin model, the microstructure of the prepared two-layer iridium / tungsten coating is similar to that of the “Zone 1” structure, which shows that the prepared coating has weak lateral bonding strength and is prone to occur under tensile stress Cracking.