摘要
硼化铪(HfB2)具有优异的抗氧化性能,作为超高温材料在耐磨涂层、航空领域具有极高的应用价值,而纯度是影响其应用的关键因素。本文采用烧结工艺制备HfB2粉末,利用X射线衍射仪、扫描电子显微镜、X射线能谱仪等表征了粉末的结晶性能、形貌、元素分布等。研究了硼源、混料方式对HfB2粉末结构的影响,测定C、O等杂质含量,通过差减法计算得HfB2纯度。结果表明,碳化硼(B4C)作为硼源、混料采用机械混合的HfB2性能最佳,X射线衍射中仅有HfB2结晶峰,扫描电镜中均为HfB2紧密团聚形貌,通过化学分析测定杂质含量,差减法计算HfB2纯度可达到98.19%。
As an ultra-high temperature material,Hafnium boride(HfB2)exhibits excellent antioxidant properties which have been widely used in the field of wear-resistant coatings and aviation.Among the many factors,the purity is a key factor that affects its application.In this work,the sintering process was used to prepare hafnium boride powder,and the crystal properties,morphology and element distribution of the powder were characterized by X-ray diffraction,scanning electron microscope and energy dispersive spectroscopy.The effects of boron source and mixing method on the structure of hafnium boride powder were studied.The content of impurities such as C and O were detected,and the purity of hafnium boride was calculated by the subtraction method.The results showed that B4C as the source of boron and the mechanically mixed hafnium boride possess the best performance.Only the crystallization peaks of hafnium boride were found in XRD,and the morphology of hafnium boride in SEM was closely aggregated.The impurity content was detected by chemical analysis,and the purity of the hafnium boride calculated by difference subtraction was 98.19%.
作者
贾坤乐
张鑫
张思源
王彦军
Kunle Jia;Xin Zhang;Siyuan Zhang;Yanjun Wang(BGRIMM Technology Group,Beijing 100160;BGRIMM Advanced Materials Science&Technology Co.,Ltd,Beijing 102206;Beijing Key Laboratory of Special Coating Material and Technology,Beijing 102206;Beijing Engineering Technology Research Center of Surface Strengthening and Repairing of Industry parts,Beijing 102206)
出处
《热喷涂技术》
2020年第2期30-35,51,共7页
Thermal Spray Technology
关键词
硼化铪
碳化硼
硼酸
纯度
Hafnium boride metal
Boron carbide
H3BO3
Purity
