Abstract
Powder extension technique was applied to production of aluminum short fiber and effects of particle size of raw powders (aluminum and sodium chloride employed as fiber forming agent) and extrusion parameters (temperature and extrusion ratio) on fiber length, surface appearance and recovery rate were examined. Extrusion temperature which reduced the difference in flow stresses of aluminum and sodium chloride, for example 723K, improved uniformity, surface appearance and recovery rate of aluminum fiber, and the fiber length increased with extrusion temperature. Increasing in extrusion ratio and both particle size of aluminum and sodium chloride also gave rise to longer fiber formation. Long aluminum fiber with a length of 40 to 50mm, which was formed from welding of segregate aluminum powder particles during extrusion, was fabricated using sodium chloride with larger particle size (mean particle size 467μm).
