CAJ | 학술논문

为了实现C/SiC复合材料与难熔金属的连接,通过熔盐法在C/SiC复合材料表面沉积钛金属层.用SEM和EDS研究金属化层的形貌及成分;用X射线衍射分析金属化层的相组织:用定量金相法测量钎焊料的铺展特性.研究表明:钛金属化层均匀致密,与基体结合紧密,钛金属可渗入纤维间孔隙,比较完整地包覆在C/SiC复合材料外表面.金属化层主要成分为TiC、Ti5Si3.金属化层与SiC界面分为3层,由内到外主要成分为Ti5Si3、TiC和Ti5Si3.表面金属化后的C/SiC复合材料与钛合金钎焊料润湿性明显改善,润湿角从153.9°降低为13.2°.
위료실현C/SiC복합재료여난용금속적련접,통과용염법재C/SiC복합재료표면침적태금속층.용SEM화EDS연구금속화층적형모급성분;용X사선연사분석금속화층적상조직:용정량금상법측량천한료적포전특성.연구표명:태금속화층균균치밀,여기체결합긴밀,태금속가삼입섬유간공극,비교완정지포복재C/SiC복합재료외표면.금속화층주요성분위TiC、Ti5Si3.금속화층여SiC계면분위3층,유내도외주요성분위Ti5Si3、TiC화Ti5Si3.표면금속화후적C/SiC복합재료여태합금천한료윤습성명현개선,윤습각종153.9°강저위13.2°.
Ti metallized coating was prepared on the surface of carbon fiber reinforced silicon carbide matrix (Cf/SiC) composite by molten salt reaction to make joining the composite with high melt point metals such as Ti. The morphologies and compositions of Ti metallized coating were analyzed by SEM and EDS. The phase components were assessed by XRD. The wettability of the solder was measured by quantitative metallography. The results show that Ti metallized coating is uniform and dense, and bound with the matrix closely. Ti can infiltrate into the gaps of the fibers, and cover the surfaces of the Cf/SiC composite. The main phases of the metalized coating consist of TiC and Ti5Si3. There are three transition layers between SiC and the metallized, I. E. Ti5Si3 layer, TiC layer and Ti5Si3 layer. The wettability of Cf/SiC composites surface to Ti is greatly improved by metallization, and the contact angle is deceased from 153.9° to 13.2° at 950 ℃.