在0.6 MPa的纯氢气氛中，采用金属/氢共晶定向凝固技术，制备得到不同Cr含量的GASAR多孔Cu-xCr合金试样(x=0,0.3%,0.5%,0.8%,1.0%,1.3%(质量分数，%))，并研究了Cr含量对多孔Cu-xCr合金气孔率和气孔平均直径的影响规律。结果表明：随Cr含量的逐渐增大，氢在合金熔体中的溶解度相应增加，导致多孔 Cu-xCr合金试样的气孔率缓慢增高；此外，随 Cr 含量的增加，受糊状区宽度变化的影响，气孔的平均直径呈先增大后减小的趋势。
GASAR porous Cu-xCr (x=0, 0.3%, 0.5%, 0.8%, 1.0%, 1.3% (mass fraction)) alloys were fabricated by the metal/hydrogen unidirectional solidification method under a hydrogen gas pressure of 0.6 MPa. The effect of the chromium content on the pore structure was investigated. The results show that the difference of hydrogen solubility between liquid and solid contributes to the increase of porosity with increasing Cr content. With increasing Cr content, the average pore diameter tends to firstly increase, and then decrease.
参考文献
| [1] | NAKAJIMA H. Fabrication, properties and application of porous metals with directional pores[J]. Progress in Materials Science, 2007, 52(7):1091-1173.,2007. |
| [2] | BANHART J. Manufacture, characterization and application of cellular metals and metal foams[J]. Progress in Materials Science, 2001, 46(6):559-632.,2001. |
| [3] | SHAPOVI V I, BOYKO L. Gasar-A new class of porous materials[J]. Advanced Engineering Materials, 2004, 6(6):407-410.,2004. |
| [4] | HYUN S K, NAKAJIMA H. Anisotropic compressive properties of porous copper produced by unidirectional solidification[J]. Materials Science and Engineering A, 2003, 340(1/2):258-264.,2003. |
| [5] | HYUN S K, NAKAJIMA H. Effect of solidification velocity on pore morphology of lotus-type porous copper fabricated by unidirectional solidification[J]. Materials Letter, 2003, 57(21):3149-3154.,2003. |
| [6] | YAMAMURA S, SHIOTA H, MURAKAMI K, NAKAJIMA H. Evaluation of porosity in porous copper fabricated by unidirectional solidification under pressurized hydrogen[J]. Materials Science and Engineering A, 2001, 318(1/2):137-143.,2001. |
| [7] | 李言祥,刘源.金属/气体共晶定向凝固规则多孔金属的研究进展[J].材料导报,2003(04):1-4,49. |
| [8] | 谢建新,刘新华,刘雪峰,方玉诚,王浩.藕状多孔纯铜棒的制备与表征[J].中国有色金属学报,2005(11):1869-1873. |
| [9] | DRENCHEV L, SOBCZAK J, MALINOV S. Gasars:A class of metallic materials with ordered porosity[J]. Materials Science and Technology, 2006, 22(10):1135-1147.,2006. |
| [10] | NAKAJIMA H, HYUN S K, OHASHI H, OTA K, MURAKAMI K. Fabrication of porous copper by unidirectional solidification under hydrogen and its properties[J]. Colloids and Surfaces A, 2001, 179(2/3):209-214.,2001. |
| [11] | 黄峰,杨天武,李再久,黎振华,金青林,周荣.规则多孔铜压缩性能的各向异性[J].中国有色金属学报,2011(03):604-610. |
| [12] | 彭震,杨天武,李再久,黎振华,金青林,周荣.规则多孔铜的拉伸性能及其各向异性[J].中国有色金属学报,2011(05):1045-1051. |
| [13] | ZHANG H W, CHEN L T, LIU Y, LI Y X. Experimental study on heat transfer performance of lotus-type copper heat sink[J]. International Journal of Heat and Mass Transfer, 2013, 56(1/2):172-180.,2013. |
| [14] | 张华伟,李言祥,刘源.氢在Gasar工艺常用纯金属中的溶解度[J].金属学报,2007(02):113-118. |
| [15] | LIU Y, LI Y X, WAN J. Metal-gas eutectic growth during unidirectional solidification[J]. Metallurgical and Materials Transactions A, 2006, 37(9):2871-2877.,2006. |
| [16] | 蒋光锐,李言祥,刘源.凝固模式对定向凝固多孔铜锰合金气孔结构的影响[J].中国有色金属学报（英文版）,2011(01):88-95. |
| [17] | TAKUYA I, MASAKAZU T, HYUN S K, NAKAJIMA H. Fabrication of lotus-type porous Ni3 A1 by unidirectional solidification[C]//NAKAJIMA H, KANETAKE N. Porous Metals and Metal Foaming Technology. Kyoto:The Japan Institute of Metals, 2005:229-232.,2005. |
| [18] | 刘源,李言祥,张华伟,万疆.藕状规则多孔结构形成的压力条件和气孔尺寸的演变规律[J].金属学报,2005(08):886-890. |
| [19] | 李再久,金青林,杨天武,蒋业华,周荣.Gasar连铸工艺制备藕状多孔Cu-Zn合金[J].金属学报,2013(06):757-762. |
| [20] | IKEDA T, TSUKAMOTO M, NAKAJIMA H. Fabrication of lotus-type porous stainless steel by unidirectional solidification under hydrogen atmosphere[J]. Materials Transactions, 2002, 43(11):2678-2684.,2002. |
| [21] | HYUN S K, NAKAJIMA H. Fabrication of lotus-structured porous iron by unidirectional solidification under nitrogen gas[J]. Advanced Engineering Materials, 2002, 4(10):741-744.,2002. |
| [22] | PARK J S, SUZUKI S, NAKAJIMA H. Fabrication of lotus-type porous A1-Si alloys using continuous casting technique[C]//LEFEBVRE L P, BANHART J, DUNAND D C. Porous Metals and Metallic Foams. Montreal:DEStech Publications, 2007:229-232.,2007. |
| [23] | LEE P D, HUNT J D. Hydrogen porosity in directionally solidified aluminium-copper alloys:A mathematical model[J]. Acta Materialia, 2001, 49(8):1383-1398.,2001. |
| [24] | LIU Y, LI Y X. A theoretical study of Gasarite eutectic growth[J]. Scripta Materialia, 2003, 49:379-386.,2003. |
| [25] | ALCOCK C B, RICHARDSON F D. Dilute solutions in molten metals and alloys[J]. Acta Metallurgica, 1958, 6(6):385-395.,1958. |
| [26] | ZENG K J, MARKO H. Thermodynamic analysis of stable and metastable equilibria in the Cu-Cr system[J]. Calphad, 1995, 19(1):93-104.,1995. |
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%