采用内氧化法制备ZrO2弥散强化Pt-Ir-Zr高温材料.探讨了内氧化热力学条件,并利用SEM分析内氧化时间对形貌的影响,结合抗拉强度的变化确定最优的内氧化时间.结果表明:在实验条件下会发生Ir、Zr的氧化.Zr比Ir氧化所需的氧分压小.随着内氧化时间的增加,晶粒长大.直到40 h后,组织达到稳定.抗拉强度随着内氧化时间的增加呈指数降低.内氧化最优时间为40 h.
An internal oxidation method was applied to investigate the dispersion-strengthening of Pt-Ir-Zr alloy,and the thermodynamic condition was explored for this alloy.Scanning electron microscopy (SEM) was employed to analyze the internal oxidation morphologies.Combining with tensile sirength,the optimal intemal oxidation time was determined.The results show that oxidation of Ir and Zr will occur under the experimental condition,and the oxygen pressure of Zr is lower than that oflr.The grain size of the alloy increases with the prolonging of time and remains stable when the oxidation time is up to 40 h.The tensile strength decreases exponentially with the increase ofoxidation time.The time for optimal internal oxidation is 40 h at 1 100℃.
参考文献
| [1] | Jügen Merker;David Lupton;Michael Tǒpfer et al.[J].Platinum Metals Review,2001,45(02):74. |
| [2] | 潘勇,管伟明,张昆华,陈敬超,陈松.Pt-Zr合金在高氧氛围下氧化机制的第一性原理研究[J].稀有金属材料与工程,2009(02):266-270. |
| [3] | Johnson Matthey Co Ltd .Dispersion Strengthening of Platinum Group Metals Based Alloys Gold and Gold Based Alloys[P].UK Patent,1340076,1973. |
| [4] | Heraeus Gmb H W C .Dispersion Strengthened Platinum Alloy and a Method for Its Production[P].German Patent,DE 19531242,1996. |
| [5] | Heraeus Gmb H W C;Co K G .Gold-Free Platinum Material Dispersion-Strengthened by Small,Finely Dispersed Particles of Base Metal Oxide[P].US Patent,945856,2002. |
| [6] | 田中贵金属股份公司 .Manufacture of Oxide Dispersion Strengthened Platinum Material Method(氧化物弥散强化铂材料的制备)[P].China Patent,CN1383456,2002. |
| [7] | 李铁藩.High-Temperature Oxidation and Hot Corrosion'(高温氧化和高温腐蚀)[M].北京:化学工业出版社,2003:227. |
| [8] | 谢自能;熊易芬;Qian Lin(钱琳) et al.[J].Precious Metals(贵金属),1994,15(01):25. |
| [9] | Wagner C;Zeitschrift fiir .[J].Elektrochemie,1959,63(07):722. |
| [10] | Rapp R A .[J].Corrosion,1965,21:382. |
| [11] | Bohm G;Kahlweit M .[J].Acta Metallurgica,1964,12:641. |
| [12] | Gerhard;Reinacher .[J].Zeitschrift fur Metallkunde,1971,62(11):835. |
| [13] | Undisz A;Zeigmeister U;Rettenmayr M et al.[J].Journal of Alloys and Compounds,2007,438:178. |
| [14] | WU Chun-ping,YI Dan-qing,CHEN Jing-chao,LI Jian,LIU Hui-qun,WANG Bin,FANG Xi-ya.Internal oxidation thermodynamics and microstructures of Ag-Y alloy[J].中国有色金属学会会刊（英文版）,2007(02):262-266. |
| [15] | Chaston J C .[J].Platinum Metals Review,1975,19(04):135. |
| [16] | Dating A S;Rh D;Mech A M I E .[J].Platinum Metals Review,1960,4(01):18. |
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