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ydc456

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[交流] 【求助】求铜硼合金资料

哪位虫有铜硼合金的资料，制备，相图之类的，
发一下，感谢

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1楼 2009-05-06 23:01:25

已阅回复此楼关注TA 给TA发消息送TA红花 TA的回帖

xiaomuchong916

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ziice(金币+2,VIP+0):感谢您的交流 5-10 07:39
ziice(金币+0,VIP+0):可以将相图以附件（小于500k）的形式上传，不要用快速回复主题回复 5-10 07:40

CU-B合金相图是没有中间相析出的共晶相图。不知道该怎么发图片，可以看看下面的文字描述。
The equilibrium phases of the Cu-B system are (1) the fcc terminal solid solution, (Cu), with a limited maximum solubility of B of ~0.29 at.%; and (2) the terminal solid solution, (B), having several allotropic modifications, with the b-rhombohedral form dominant at elevated temperatures and the b-tetragonal and, possibly, a-rhombohedral and a-tetragonal forms stable at low temperatures. The stability ranges for these phases are not well defined. The maximum recorded solubility of Cu in (B) is between 3.65 and 4.17 at.%, with retrograde characteristics at elevated temperatures.
The Cu-B phase diagram is of the simple eutectic type with no intermediate phases present. The high melting point of B and its strong affinity for oxygen in the liquid state presented difficulties in alloy preparation and in identification of equilibrium phases in earlier studies [Hansen].
The occurrence of a eutectic reaction between the Cu-rich terminal solid solution and the compound CuB22 was reported by [54Lih]. Subsequent studies by [65Smi], [65Wal], and [70Rex] confirmed the occurrence of the eutectic reaction, but the constituent phases were shown to be the terminal solutions of Cu with that of B and not with CuB22. It was concluded that CuB22 does not occur as a separate equilibrium phase. The work of [74Hig] and [74Pit] were also reviewed in preparing the assessed diagram.
The initial slope of the liquidus at the Cu end appears to be very sensitive to the presence of impurity elements; the magnitude of the slope increases with progressive purity of the melt. The liquidus boundaries at the Cu and B ends of the diagram were drawn by applying van't Hoff's relation to the initial slopes of the solidus curves. The data of [65Wal] for the B-rich compositions were incompatible with the initial slope requirements for the liquidus and were disregarded. The remainder of the liquidus was drawn based on the data of [65Wal] and [70Rex].
54Lih: F. Lihl and O. Fleischl, Metall, 8, 11-19 (1954) in German.
65Smi: A.P. Smiryagin and O.S. Kvurt, Tr. Gos. Nauchn. Issled. Proektn. Inst. Splavov Obrab. Tsvetn. Metal., 24, 7-11 (1965).
65Wal: F. Wald and R. Stormont, J. Less-Common Met., 9, 423-433 (1965).
70Rex: J. Rexer and G. Petzow, Metall, 24, 1083-1086 (1970) in German.
74Hig: I. Higashi, Y. Takahashi, and T. Atoda, J. Less-Common Met., 37, 199-204 (1974).
74Pit: J.P. Piton, G. Vuillard, and T. Lundstrom, C.R. Acad. Sci., Ser. C, 278, 1495-1496 (1974).