采用超高真空热丝化学气相沉积（HFCVD）系统，以甲烷和氢气为反应气体，在高速钢W18Cr4V基体上利用3种不同的过渡层（WC、Cr、WC/Cr）制备金刚石薄膜。采用场发射扫描电子显微镜(FE–SEM)、X射线衍射仪(XRD)、显微激光拉曼光谱仪（Raman）以及洛氏硬度计对过渡层和金刚石薄膜进行检测分析，研究了不同过渡层对金刚石薄膜形貌质量和附着性能的影响。结果表明，3种过渡层均可以有效减少钢基中Fe对金刚石薄膜的负面影响，提高金刚石的形核率；其中，采用WC/Cr过渡层时膜基间残余应力最小，仅为0.25 Gpa，附着性能最好。

Barium and calcium fluorides containing nickel chrome/chrome carbide coatings were sprayed by high velocity oxygen fuel technique to develop self–lubricating and wear resistant coatings for brush sealing system of aero–engines. The microstructure of the coating was examined and its tensile bond strength, thermal shock and wear resistance, microhardness properties were tested and discussed. The result shows that the coating properties of Barium and calcium fluorides containing nickel chrome/chrome carbide coatings sprayed by high velocity oxygen fuel technique are excellent，which can be as a seal coating for brush sealing system.