CAJ | 학술논문

使用氢化锆为发泡剂,通过熔体发泡法制备泡沫铝并研究其影响因素.制备工艺为:添加0.6%-1.4%的发泡剂,1.5%-3.0%Ca(质量分数)作为增粘剂,发泡温度933-1 013 K,搅拌时间为0.5-2.5 min和保温时间为1.5-4.0min.利用XRD和SEM对泡沫铝样品进行表征,测试其力学性能.结果表明,在合适的工艺参数下能制备出孔径均匀的泡沫铝,采用氢化锆为发泡剂可以制备出平均孔径为l mm左右的泡沫铝.金属间化合物和A12O3的存在影响熔体的粘度.泡沫铝的力学性能经历线弹性区、平台区和致密化区并表现出较高的能量吸收效率.
사용경화고위발포제,통과용체발포법제비포말려병연구기영향인소.제비공예위:첨가0.6%-1.4%적발포제,1.5%-3.0%Ca(질량분수)작위증점제,발포온도933-1 013 K,교반시간위0.5-2.5 min화보온시간위1.5-4.0min.이용XRD화SEM대포말려양품진행표정,측시기역학성능.결과표명,재합괄적공예삼수하능제비출공경균균적포말려,채용경화고위발포제가이제비출평균공경위l mm좌우적포말려.금속간화합물화A12O3적존재영향용체적점도.포말려적역학성능경력선탄성구、평태구화치밀화구병표현출교고적능량흡수효솔.
Aluminum foams were fabricated by melt-based route using ZrH2 as a foaming agent.The factors which affected the foaming of aluminum foams during casting process were investigated.The powdered zirconium hydride with content of 0.6％-1.4％(mass fraction) was added to the molten pure aluminum and the foaming condition was controlled in a temperature range from 933 to 1 013 K,Ca amount of 1.5％-3.0％ (mass fraction),stirring time of 0.5-2.5 min and holding time of 1.5-4.0 min to obtain homogeneous aluminum foams.The fabricated aluminum foams were characterized by XRD,SEM and Image-pro plus.The mechanical properties of the aluminum foams with different relative density were tested.The result indicates that the foaming agent (ZrH2) is suitable for the preparation of small aperture aluminum foams with average pore diameter of 1 mm.Inter-metallic compounds and Al2O3 have effect on the melt viscosity.The aluminum foams experience linear elastic,platforms and densification process and had a higher efficiency of energy absorption.