(甘肅工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院, 蘭州 730050)
摘 要: 研究了反應(yīng)溫度、 Al粉含量、 預(yù)制塊致密度和表面活性元素Mg對(duì)反應(yīng)過程和相組成的影響。 隨著反應(yīng)溫度的提高, 反應(yīng)速度加快。 溫度過高, 反應(yīng)物中的CuO會(huì)發(fā)生分解反應(yīng), 從而導(dǎo)致實(shí)驗(yàn)失敗;體系中Al粉含量越高, 反應(yīng)速度越快。另外, 體系中Al粉含量的提高, 也有利于反應(yīng)生成的Al2O3分布均勻以及細(xì)小化;在合適的預(yù)制塊壓坯壓力時(shí)可以得到既具有較高的致密度,又能夠完全反應(yīng)的材料;Mg屬于表面活性元素, 它的存在能夠降低體系的反應(yīng)初始溫度, 但是不能解決反應(yīng)物和反應(yīng)產(chǎn)物的擴(kuò)散問題。因此, 溫度仍是決定反應(yīng)能否完全進(jìn)行的主要因素。 在適當(dāng)?shù)臏囟龋?00~1000℃)、 壓力(150~210MPa)、 Mg加入量(2%~5%)和Al與CuO的質(zhì)量比(約6∶1)等條件下能夠制備出反應(yīng)完全的CuO與Al反應(yīng)自生復(fù)合材料。
關(guān)鍵字: 工藝參數(shù); 自生復(fù)合材料; 氧化銅; 鋁; 反應(yīng)過程
(School of Materials Science and Engeering, Gansu University of Technology,
Lanzhou 730050, China)
Abstract:The influence of reaction temperature, resultant (Al powder) content, compactness and surface-active element Mg on the reaction process and phase composition was studied. The results show that the higher the temperature and the content of aluminum, the faster the reaction speed. But too higher temperature will lead to the deposition of CuO. Magnesium can decrease the start temperature of system reaction. Under the conditions of proper temperature (800~1000℃), pressure (150~210Mpa), content of Mg(2%~5%) and quantity ratio of Al and CuO (about 6:1) can be fabricated the aluminum matrix composites insitu reinforced by Al2O3p from the completing reaction of CuO to Al.
Key words: technical parameter; composite in-situ; CuO; Al; reaction process


