微波-熔盐热处理在CBN表面形成TiN类石墨烯晶体

摘要

Titanium nitride on the surface of cubic boron nitride (CBN) was obtained by heat treatment of Ti and CBN with microwave and salt molten.Chemical compositions,phase compositions and microstructures were analyzed and characterized using XRD,SEM and EDS methods.The results show that TiN,Ti2 N,TiN0.3 and TiB2 organization were formed on the surface of CBN by molten-salt treatment.The coating of CBN with a coarser size had a thickness of about 2.8 μm.There were many micro pores on this coating.Flower bud nanometer coating was formed on the fine-grained CBN surface.This coating had many titanium nitride nano-rods and nano sheets.In addition to,some TiN graphene crystals,40-90 nm thick were obtained among CBN particles.%用Ti和CBN粉体,通过微波-熔盐处理法在CBN表面反应生成氮化物材料,利用XRD、SEM和EDS对涂层的化学组成、相组成和微观结构进行分析和表征.结果表明:经过熔盐处理,在CBN表面形成TiN、Ti2N、TiN0.3和TiB2组织.粗粒度的CBN表面形成的涂层厚度约2.8 μm,涂层表面有许多微小孔洞;当CBN较细时,CBN表面形成纳米花蕾状组织,花蕾状涂层组织由许多氮化钛纳米棒和片状组织构成.此外,CBN颗粒间还存在许多TiN类石墨烯晶体组织,厚度约40～90 nm.