Protective ceramic multilayer coatings for carbon fibers

Structure, mechanical and tribological properties of HfCx films deposited by reactive magnetron sputtering

“…This leads us to believe that carbon exists in three different chemical surroundings, which is similar with other reports on nc-MeC/a-C:H films (M=Ti, Zr) [7,[28][29][30]. The obvious peaks at 281.2 eV is identified as hafnium carbide (C-Hf bond), and the peaks at 284.5 eV can be attributed to a-C:H phase (C-C bonds) [31,32]. However, the peak at 282.5 eV (marked as C-Hf*) between C-Hf and C-C bond have not yet been noted in HfC films by others.…”

Low-temperature solution synthesis of nanosized hafnium carbide using pectin

“…HfC powder can be prepared by different methods including solid state combustion [7], carbothermal reduction of metal oxides [8], vapour phase synthesis [9], sol-gel [10], laser and plasma chemical synthesis [11]. Since most carbides are conventionally made by sintering of powders, their properties depend to a great extent on the quality of the starting powders.…”

Synthesis of Refractory Metal Carbide Nanocoatings on Carbon Fibers and Nanoneedles of Silicon in Molten Salts

“…Being important cermet materials, tantalum and niobium carbides are commercially used in tool bits for cutting applications and sometimes are added to tungsten carbide alloys (1). Tantalum carbides are also used for improving the vane tips, front sections of aircraft, and gas turbine jets (2). Coatings of refractory metal carbides on carbon fibers improve a fiber's mechanical resistance and they are compatible with the fiber up to 1473 K in an aggressive atmosphere.…”