通过对Ag/CuO复合材料在反应合成制备中各元素、亚金属氧化物与1 mol氧气反应生成金属氧化物的标准自由焓的热力学计算,绘制了标准自由焓与温度关系图;考虑到氧压力对反应进行有重要影响,在标准自由焓与温度关系图中绘制了氧压力随温度变化的直线.结果表明:Ag与O_2,Cu_2O与O_2的反应是一种可逆反应,其发生可逆转变的温度分别为586.818,667.663 K;氧的压力对金属氧化物的分解有重要影响:压力越低,金属氧化物越易分解;并通过热力学分析结果,最终确定了Ag/CuO复合材料反应合成烧结工艺.
Gibbs' function of metal oxide from the reaction between elements as well as sub-metal oxides and 1 mol oxygen in Ag/CuO composites by reactive synthesis was calculated thermodynamically; through the calculation, the relation diagram was drawn for Gibbs' function and temperature. Considering oxygen pressure influencing the reaction greatly, the oxygen pressure line with temperature change was also drawn in the diagram above. Results show that the reactions between Ag and O_2, and Cu_2O and O_2 are reversible, whose temperature for reversible transition are 586.818 K and 667.663 K, respectively. The oxygen pressure is important for decomposition of metal oxides: the lower the oxygen pressure is, the more easily the oxides decompose. The reactive synthesis sintering technology of Ag/CuO composite was determined by thermodynamic analysis.
参考文献
| [1] | Ni DR;Geng L;Zhang J;Zheng ZZ .Fabrication and tensile properties of in situ TiBw and TiCp hybrid-reinforced titanium matrix composites based on Ti-B4C-C[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):291-296. |
| [2] | Roy D;Ghosh S;Basumallick A et al.[J].Journal of Alloys and Compounds,2007,436:107. |
| [3] | Farid Akhtar .Microstructure evolution and wear properties of in situ synthesized TiB_2 and TiC reinforced steel matrix composites[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2008(1/2):491-497. |
| [4] | 叶家健,熊惟皓,徐坚,傅江华,李震彪.低压继电器用AgSnO2触头材料的研究进展[J].材料导报,2007(02):87-90. |
| [5] | 吴春萍;易丹青;李荐.[J].电工材料,2006(06):24,34. |
| [6] | Arami H;Simchi A .[J].Materials Science and Engineering,2007,A(464):225. |
| [7] | 周晓龙,陈敬超,曹建春,杜焰,张昆华,甘国友,闫杏丽.银氧化铜复合材料反应合成制备[J].稀有金属材料与工程,2006(05):814-816. |
| [8] | 周晓龙,陈敬超,孙加林,张昆华,杜焰.AgSnO2触头材料的反应合成制备与大塑性变形加工[J].中国有色金属学报,2006(05):829-834. |
| [9] | 叶大伦;胡建华.实用无机热力学数据手册[M].Bei-Jing:Metallurgical Industry Press,2002 |
| [10] | 叶大伦.冶金热力学[M].长沙:中南工业大学出版社,1987 |
| [11] | 周安生;高一平;王颖.粉末冶金[M].北京:科学出版社,1978 |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%