【摘要】：為發(fā)揮氧化石墨烯在熱噴涂碳化鎢耐磨涂層中自潤滑性能,提高氧化石墨烯與熱噴涂粉末的相容性,將偏鎢酸銨作為鎢的前驅(qū)體與氧化石墨烯混合,采用還原技術(shù)在氧化石墨烯表面原位生長納米尺度碳化鎢顆粒。借助XRD和SEM研究偏鎢酸銨與氧化石墨烯不同摩爾配比、不同升溫速率、不同反應(yīng)溫度等條件下獲得樣品的物相組成及表面形貌。結(jié)果表明:氧化石墨烯表面原位生長納米碳化鎢所需原料氧化石墨烯與偏鎢酸銨最佳配比優(yōu)化后對(duì)應(yīng)為n(W)∶n(C)=1∶5,最佳升溫速率為70℃/min,最佳還原溫度為700℃,該條件下獲得樣品形貌為納米片層氧化石墨烯表面彌散分布有尺度均勻的納米碳化鎢顆粒。
[Abstract]:In order to improve the compatibility of graphene oxide and thermal sprayed powder, ammonium metatungstate was mixed with graphene oxide as precursor of tungsten oxide. Nanoscale tungsten carbide particles were grown in situ on the surface of graphene oxide by reduction technique. The phase composition and surface morphology of the samples were studied by XRD and SEM under different molar ratio of ammonium metatungstate to graphene oxide, different heating rate and different reaction temperature. The results show that the optimum ratio of graphene oxide and ammonium metatungstate for in-situ growth of nano-tungsten carbide on graphene oxide surface is n (W): n (C) = 1: 5, and the optimum heating rate is 70 鈩，

本文編號(hào)：2352732