摘要
将活性涂层陶瓷颗粒分别装在能够透气的管状耐火砖和致密陶瓷管内,然后加热到710℃用于过滤铝熔体。研究结果表明,在透气条件下,拉伸试样的延伸率下降,并且拉伸断口裂纹大,韧窝大而不均匀;金相试样中的夹杂物数量多而且尺寸也大。在不透气(致密陶瓷管)条件下,当陶瓷颗粒尺寸为1mm,过滤后的拉伸试样延伸率达到48.7%,提高16%,拉伸断口裂纹细且韧窝小而均匀,仅有少数8μm的夹杂物。
Active coating ceramic particles were filled in air-permeable micropore tubal firebrick and dense ceramic tube respectively, and then used to filter molten aluminum at 710°C. For filtered tensile sample under the air-permeable tubal firebrick condition, the elongation of tensile sample decreases, whose fracture cracks and dimples are large and inhomogeneous by observing SEM photograph. Quantities and sizes of inclusions were many and large by observing metallographic specimen. For filtered tensile sample under the air-impermeable ceramic tube condition, the elongation of tensile sample reaches 48.7%, whose elongation increases 16% by contrast to the elongation of tensile sample unfiltered. The fracture cracks and dimples of tensile sample were fine and homogeneous, and there were only few 8 μM inclusions.
出处
《航空材料学报》
EI
CAS
CSCD
2003年第2期39-44,共6页
Journal of Aeronautical Materials
基金
国家重点基础研究专项973(G1999064900)
