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摘要: 用光分析技术,测量了在一维应变冲击条件下,无氧铜的高压下声速,压力范围为125~170 GPa。将上述结果与Broberg、Morris等和Aльгшуер等过去发表的数据结合在一起,对0~170 GPa整个压力区间的声速数据做了综合分析,给出了声速随压力的变化规律。实验结果发现,无氧铜在156~159 GPa之间开始发生冲击熔化,到170 GPa左右,完全进入液相区;对于处于0~156 GPa固体无氧铜的弹性声速cl可用ln cl=1.565 888-2.645 48810-2ln p+2.710 68110-2ln2p拟合公式描述(p的单位为GPa,cl的单位为km/s),拟合值与实验值的相对误差小于1.3%。Abstract: Sound velocities of copper at high shock pressures were determined by using optical analyzer technique under on-dimensional strain condition. The measured pressure range was from 125 GPa to 170 GPa. Combined with the data given earlier by Broberg, Morris et al., Altshuler et al., and ours, a comprehensive analysis for sound velocities at pressures of 0~170 GPa was also made. It shows the elastic sound velocity cl of solid-state copper, when the pressure is between 0~156 GPa, monotonically increases with the increasing of shock pressure and can be represented by the following equation ln cl=1.565 888-2.645 48810-2ln p+2.710 68110-2ln2p. Relations errors between the data deduced from the above equation and the measurement are less than 1.3%. Moreover, the shock-melting, marked as the sudden drop of sound velocity in c-p relation, occurs at 156~159 GPa and completes at about 170 GPa, for which a rather satisfactory verification is also acquired by the Lindeman melting-law in the analysis.
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Альтшулер П В, Кортир С Б, м др. ЖЭТФ, 1960, 38: 1061. Barker L, Hollonback R E. J Appl Phys, 1974, 45: 4872. Fritz J N, Morgan J A. Rev Sci Instrum, 1973, 44: 215. McQueen R G, Hopson J W, Fritz J N. Rev Sci Instrum, 1982, 53(2): 245. Rosenberg Z, Yaziv D, Partom Y. J Appl Phys, 1980, 51: 3702. Asay J R, Chhabides L G. In: Shock Wave and High-Strain Rale Phenomena in Metals. ed by Meyers M A, Murr L E. Plenum Press, 1981: 417. Brown J M, Shaner J W. In: Shock Waves in Condensed Matter -1983, 91. Foules G R. J Appl Phys, 1961, 32: 1475. Asay J R, Chhabildas E G, et al. In: Shock Waves in Condensed Matter-1985, 145. McQueen R G, Fritz J N, Morris C E. In: Shock Waves in Condensed Matter-1983, 95. 布罗贝格 K B. 尹样础, 译. 弹性及塑性介质中的冲击波. 北京: 科学出版社, 1965. Альтшулер П В, Бражник М И, Телегин Г С. ИМТФ, 1971, (6): 159. Morris C H, Fritz J N, Holian B E. LA-UR-81-1897. 王贵朝, 等. 高压物理学报, 19871(2): 144. 王贵朝. 私人通信. 王贵朝. 高压物理学报, 1988, 2(1): 92. Konodo K, Sawaoka A, Saito S. Rev Sci lustrum, 1977, 48: 74. 经福谦, 等. 实验物态方程导引. 北京: 科学出版社, 1986: 317-323. McQueen R G, Marsh S P, Taylor J W, et al. In: Velocity Impact Phenomena. Ed by R Kinslow. NY: Academic Press, 1970. 李茂生, 陈栋泉, 林绍明. 爆炸与冲击, 1984, 4(4): 60. Huang Y K. J Chem Phys, 1966, 45: 1979.
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