نوع مقاله : علمی و پژوهشی
نویسندگان
1 دانشگاه صنعتی قوچان
2 دانشگاه صنعتی بیرجند
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In this work, lead foams containing alumina nano-particles (contains from 0, 0.1, 0.2, 0.4 and 0.8 wt. %) are manufactured through powder metallurgy using urea granules as leachable space holders. The leaching behavior of urea granules, porosity contents and compression properties of lead foams and also, microstructure of cell walls by optical and field emission scanning electronic microscopes are investigated. The results show in the multi-stage of leaching processes, about 80% of urea granules dissolved in seven stages. The optical images prove the good agglomeration of lead powder particles. By increasing the alumina particles, the porosity content of manufactured foams that is in the range of 80-83% is increased. The images of FESEM and X-ray spectroscopic maps show the uniform distribution of alumina nano-particles in the cell walls. The compression properties of manufactured foams, by increasing the alumina nano-particles to 0.1 wt.% first decreases, then after 0.4 wt.% enhanced, and finally in the 0.8 wt.% of nano-particles goes down again.
کلیدواژهها [English]
)
ارسال نظر در مورد این مقاله