以熔体直接发泡法制备闭孔泡沫铝材实验为基础,通过获得不同实验阶段的泡沫铝样品,以及对实验样品切面或断面进行观察和分析,描述了在熔体发泡法制造泡沫铝过程中TiH2加入熔体后的分解过程,原始气泡的形成方式以及产生的气泡和未分解TiH2的存在状态;解释了气泡进一步长大的原因和未分解的TiH2如何释放气体;表述了气泡的合并和无泡层的形成.结果表明:未分解的TiH2颗粒粘附在熔体内形成的较小气泡表面,即气/液相界面上;在恒温发泡过程中气泡壁上吸附的尚未分解的TiH2颗粒进一步分解并向气泡内释放气体,使气泡长大;相邻气泡壁上的TiH2局部浓度较高并集中释放气体,导致气泡壁破裂及气泡间的合并.
参考文献
| [1] | S.W.IP;Y.Wang .Aluminum foam stabilization by solid particles[J].Canadian Metallurgical Quarterly,1999(1):0-0. |
| [2] | Beals JT.;Thompson MS. .DENSITY GRADIENT EFFECTS ON ALUMINIUM FOAM COMPRESSION BEHAVIOUR[J].Journal of Materials Science,1997(13):3595-3600. |
| [3] | I.Duarte;J.Banhart .A Study of Aluminium Foam Formation—Kinetics and Microstructure[J].Acta materialia,2000(9):2349-2362. |
| [4] | Frank Baumgartner;Isabel Duarte;John Banhart .Industrialization of powder compact foaming process[J].Advanced Engineering Materials,2000(4):168-174. |
| [5] | Baumeister J;Banhart J;Weter M .Aluminium foams for transport industry[J].Materials & Design,1997,18(4-6):217-220. |
| [6] | Hidetoshi V;Shigeru A .Effects of calcium addition on the foamability of molten aluminum[J].Light Metals,1987,37(01):42-47. |
| [7] | C.C.Yang;H.Nakae .Foaming characteristics control during production of aluminum alloy foam[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2000(1/2):188-191. |
| [8] | 吴铿;潜伟;储少军 等.制备泡沫铝时增粘过程的基础研究[J].中国有色金属学报,1998,8(S1):80-85. |
| [9] | S.M. Oak;B.J. Kim;W.T. Kim .Physical modeling of bubble generation in foamed-aluminum[J].Journal of Materials Processing Technology,2002(0):304-309. |
| [10] | Gniloskurenko S V;Raichenko A I;Nakamura T et al.Theory of initial microcavity growth in a liquid metal around a gas-releasing particle( Ⅱ )-bubble initiation conditions and growth kinetics[J].Powder Metallurgy and Metal Ceramics,2002,41(1-2):90-96. |
| [11] | 吴照金,何德坪.泡沫铝凝固过程中孔隙率的变化[J].科学通报,2000(08):829-834. |
| [12] | 王斌;何德坪;舒光冀 .铝合金泡沫化过程中影响成核的两个工艺因素对孔结构的影响[J].铸造,1998,4:8-11. |
| [13] | 吴铿,梁志刚,张炳哲,姚克虎,牛四通,赵纪伟.内生气源发泡过程的平均发泡寿命和发泡强度[J].中国有色金属学报,2000(06):909. |
| [14] | 姚广春;张晓明;孙挺 等.熔体直接发泡法制造闭孔型泡沫铝的方法[P].CN 1320710,2001-11-07. |
| [15] | 程昊 .直接发泡法制造泡沫铝的研究[D].东北大学,1999. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%