摘要
采用高能球磨-压制成形-真空烧结工艺制备了10W-30B_(4)C/60Al复合屏蔽材料。研究了烧结温度对其微观组织、物理性能及屏蔽性能的影响。结果表明,当烧结温度为530~630℃时,复合材料颗粒之间的均匀度、密度及致密度均随烧结温度的升高先上升后下降,而孔隙率则先降低后升高,提高烧结温度还可以改善复合材料的中子与γ射线屏蔽性能,但当烧结温度达到一定值后,其屏蔽性能随烧结温度的升高会下降。当烧结温度为600℃时,其复合性能最优,组织均匀致密,密度和致密度达到最大值,分别为1.836 g/cm^(3)和62.3%,衰减系数也达到了最大值0.121。
The 10 W-30 B_(4)C/60 Al composite shielding material was prepared by high energy ball milling,pressing forming and vacuum sintering process.The effects of sintering temperature on microstructure,physical properties and shielding properties of W-Al-B_(4)C composites were investigated systematically.The results indicate that with the sintering temperature of 530~630℃,the uniformity,density and compactness of 10 W-30 B_(4)C/60 Al composite particles are increased firstly and then decreased with the increase of sintering temperature,while the porosity is decreased firstly and then increased.The increase of sintering temperature can also improve the shielding properties of neutron andγray in the composite,which,however,is decreased with the increase of sintering temperature when reaching a certain value.When the sintering temperature is 600℃,the performance of 10 W-30 B_(1)C/60 Al composite is desirable,and the microstructure is uniform and compact,where the density and compactnessreach the maximum value of 1.836 g/cm^(3)and 62.3%,respectively,and the attenuation coefficient also reaches the maximum value of 0.121.
作者
唐旭凤
唐德文
Tang Xufeng;Tang Dewen(Hunan Provincial Key Laboratory of Emergency Safety Technology and Equipment for Nuclear Facilities,University of South China)
出处
《特种铸造及有色合金》
CAS
北大核心
2022年第2期174-178,共5页
Special Casting & Nonferrous Alloys
