( 1. 中南大学 冶金科学与工程学院，长沙 410083；
2. 郑州轻金属研究院， 郑州 450041)
摘 要: 采用材料力学应力状态分析理论， 通过计算氢氧化铝晶粒叠合面的正应力与剪应力， 研究了叠合面上关键点的应力状态， 建立了叠合方式—应力状态—强度的关系， 并对二段种分氧化铝生产工艺中采用精液分流技术的产品形貌、 结构和强度进行了研究。 结果表明： 氢氧化铝晶粒强度与叠合面承受的应力状态密切相关， 正应力成为强度的关键因素； 各种不同氢氧化铝晶体间叠合方式中， 晶体底面与底面叠合时， 氢氧化铝晶粒强度较高并随两个晶体间叠合面积的减小而减小； 采用精液分流技术生产出的产品氢氧化铝和氧化铝晶粒， 晶体间多为底面与底面叠合且叠合面积较大， 氧化铝强度较高。
关键字: 氢氧化铝； 强度； 晶体叠合； 应力状态
Al(OH)3 grain
（ 1. School of Metallurgical Science and Engineering,
Central South University, Changsha 410083, China;
2. Zhengzhou Research Institute of Light Metals,
Zhengzhou 450041, China）
Abstract: Using stress-state analysis, the stress-state between two overlapped Al(OH)3 crystals was calculated. The relationship between the strength and the way of overlapping of the crystals was obtained. The pattern, structure and strength of the product were studied. The results show that the strength of Al(OH)3 product is closely related to the stress-state of the overlapped Al(OH)3 crystals where the main reason of the shatter on the interface is normal stress. Of all the different ways of overlapping, the strength of two overlapped Al(OH)3 crystals facing to facing is the highest which decreases with the decreasing overlapping area.
Key words: Al(OH)3; strength; crystal overlapping; stress-state
