| 激光超声技术测量高温下蓝宝石单晶的弹性模量 |
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| 引用本文： | 宋云飞,于国洋,殷合栋,张明福,刘玉强,杨延强. 激光超声技术测量高温下蓝宝石单晶的弹性模量[J]. 物理学报, 2012, 61(6): 64211-064211 |
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| 作者姓名： | 宋云飞 于国洋 殷合栋 张明福 刘玉强 杨延强 |
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| 作者单位： | 哈尔滨工业大学物理系凝聚态科学与技术研究中心, 哈尔滨, 150001;哈尔滨工业大学物理系凝聚态科学与技术研究中心, 哈尔滨, 150001;哈尔滨工业大学物理系凝聚态科学与技术研究中心, 哈尔滨, 150001;哈尔滨工业大学复合材料与结构研究所, 哈尔滨, 150001;哈尔滨工业大学物理系凝聚态科学与技术研究中心, 哈尔滨, 150001;哈尔滨工业大学物理系凝聚态科学与技术研究中心, 哈尔滨, 150001 |
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| 基金项目： | 国家自然科学基金(批准号: 20973050)资助的课题. |
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| 摘 要： | 利用纳秒激光脉冲所激发的超声纵波, 非接触地测量了蓝宝石单晶沿c轴方向的弹性模量 C33随温度的变化关系. 结果表明, 在室温到1000 ℃ 的范围内, 蓝宝石的弹性模量C33随温度T的升高而减小, 两者之间近似呈如下二次关系: C33 = - 1.541× 10-5T2 - 0.021T + 498.3. 由于该方法利用激光烧蚀效应激发出了强度很大的纵波, 因此对弹性模量的测量具有较高的精度, 估算C33的测量误差不超过0.1%.
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| 关 键 词： | 激光超声 蓝宝石 弹性模量 高温 |
| 收稿时间： | 2011-06-07 |
Temperature dependence of elastic modulus of single crystal sapphire investigated by laser ultrasonic |
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| Song Yun-Fei,Yu Guo-Yang,Yin He-Dong,Zhang Ming-Fu,Liu Yu-Qiang and Yang Yan-Qiang. Temperature dependence of elastic modulus of single crystal sapphire investigated by laser ultrasonic[J]. Acta Physica Sinica, 2012, 61(6): 64211-064211 |
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| Authors: | Song Yun-Fei Yu Guo-Yang Yin He-Dong Zhang Ming-Fu Liu Yu-Qiang Yang Yan-Qiang |
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| Affiliation: | Center for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China;Center for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China;Center for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China;Center of Composite Materials, Harbin Institute of Technology, Harbin 150001, China;Center for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China;Center for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | The longitudinal ultrasonic wave launched by ns-laser pulse is used to measure the temperature dependence of the elastic modulus C33 of single crystal sapphire.The result shows that in a temperature from room temperature to 1000°C the elastic modulus of sapphire C33 reduces as the temperature increases,following the relationship C33 =-1.541 x 10(-50T2 - 0.021T + 498.3.In this method,the ablation mechanism is adopted to launch strong longitudinal waves,therefore,the result is accurate that the error of the measurement is estimated to be no more than 0.1%. |
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| Keywords: | laser ultrasonic sapphire elastic modulus high temperature |
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