PREPARATION AND MICROSTRUCTURE OF TiB2/Al2O3 COMPOSITE COATING BY MELTING IN-SITU REACTION PROCESSING
TiB2/Al2O3 composite coatings were fabricated on a substrate of casting steel HT200 by melting in-situ reaction processing (MIRP) using Al-TiO2-B2O3 elemental powder blends. The phases, microstructure, element distribution of the coating were studied by means of XRD and EPMA. The results show that the coating contains TiB2 and Al2O3 phases. The microstructure has two main existing forms: one is TiB2 particles aggregated area, the other is the intermixed area of TiB2 and Al2O3. In the intermixed area, the granular TiB2 particles are in network distribution along the interface of Al2O3 phases. The Vickers microhardness of TiB2 particles aggregated area ranges from HV2400 to HV3800, and HV1800 to HV3200 for TiB2 and Al2O3 intermixed area, respectively.
Melting In-situ Reaction Synthesis composite Coating Microstructure
Cao Lili Cui Hongzhi Chen Yunbo
Advanced Manufacture Technology Center China Academy of Machinery Science & Technology, State Key La Shandong University of Science &Technology,Qingdao Shandong, 266510,China Advanced Manufacture Technology Center China Academy of Machinery Science & Technology, State Key La
国际会议
北京
英文
443-446
2010-11-23（万方平台首次上网日期，不代表论文的发表时间）