( 1. 中南大學(xué) 冶金科學(xué)與工程學(xué)院，長沙 410083；
2. 鄭州輕金屬研究院， 鄭州 450041)
摘 要: 采用材料力學(xué)應(yīng)力狀態(tài)分析理論， 通過計算氫氧化鋁晶粒疊合面的正應(yīng)力與剪應(yīng)力， 研究了疊合面上關(guān)鍵點的應(yīng)力狀態(tài)， 建立了疊合方式—應(yīng)力狀態(tài)—強度的關(guān)系， 并對二段種分氧化鋁生產(chǎn)工藝中采用精液分流技術(shù)的產(chǎn)品形貌、 結(jié)構(gòu)和強度進行了研究。 結(jié)果表明： 氫氧化鋁晶粒強度與疊合面承受的應(yīng)力狀態(tài)密切相關(guān)， 正應(yīng)力成為強度的關(guān)鍵因素； 各種不同氫氧化鋁晶體間疊合方式中， 晶體底面與底面疊合時， 氫氧化鋁晶粒強度較高并隨兩個晶體間疊合面積的減小而減小； 采用精液分流技術(shù)生產(chǎn)出的產(chǎn)品氫氧化鋁和氧化鋁晶粒， 晶體間多為底面與底面疊合且疊合面積較大， 氧化鋁強度較高。
關(guān)鍵字: 氫氧化鋁； 強度； 晶體疊合； 應(yīng)力狀態(tài)
Al(OH)3 grain
YE Lu-sheng1, LIU Ye-xiang1
（ 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
