高温吸波涂层的制备及其力学性能研究

Exploring Feasibility of Preparing High-Temperature Absorbing Materials with SiCN Nanopowder and BaO-La_2O_3-B_2O_3 Glass

以BaO-La2O3-B2O3系玻璃为粘结剂,S iCN纳米吸收剂作为添加剂,采用热压粘涂法在钛合金板表面制备了一系列涂层。文中分析了BaO-La2O3-B2O3系玻璃的性能,探索了粘涂工艺和S iCN纳米粉含量对涂层抗拉强度的影响机理。结果表明含有吸收剂的涂层粘接强度低于不含吸收剂的涂层,由于涂层内存在S iCN纳米粉团聚现象,拉伸时趋于内聚破坏,而界面的结合则比较致密。随着吸收剂含量的增加,涂层的抗拉强度明显降低。

Aim. There are tempting advantages for using SiCN as absorber and BaO-La2O3-B2O3 glass as matrix material to prepare high-temperature absorbing material needed by stealth technology. We now present the results of our research on exploring the feasibility of so preparing high-temperature absorbing material. In the full paper, we explain in detail the results of our exploration; in this abstract, we just add some pertinent remarks to listing the two topics of explanation： （1） experiments; （2） results and discussion; the subtopics of topic 1 are preparation of glass coats （subtopic 1. 1） and the determination of material properties （subtopic 1.2）; the subtopics of topic 2 are the characteristic temperature and other properties of glass （subtopic 2. 1）, tensile strength of coat （subtopic 2. 2）, and fractograph and the microstructure of interface （subtopic 2.3） ; under subtopic 2. 2, the test results listed in Table 2 in the full paper show that the tensile strength of coat without SiCN is much higher than with more or less SiCN and that the tensile strength of absorbing coat worsens with increasing concentration, due possibly to the aggregating of SiCN in the coat; under subtopic 2. 3, Fig. 4 in the full paper, a photograph of the microstructure of the interface, appears to indicate that breakage occurs first within the coat and then at the interface of Ti alloy plate and coat, indicating that the bond strength of interface is higher than that of coat. The results of our exploration show preliminarily that it is feasible to prepare high-temperature absorbing material with SiCN as absorber and BaO-La2O3-B2O3 glass as matrix material.