Elastic moduli of single crystal and polycrystalline MgO
Elastic moduli of single crystal and polycrystalline MgO
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DOI：
10.1080/14786436308213840
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发表时间：
1963-05
影响因子：
1.6
通讯作者：
D. Chung
中科院分区：
文献类型：
--
作者：
D. Chung
用福斯特共振法测定了镁合金单晶和多晶在kcps频率范围内的弹性模量。单晶在25°C时得到的值为：c11 = 28•92c 12 = 8•79和c44 = 15•46 × 1011达因/ cm2。计算得到的多晶MgO的各向同性弹性模量与理论密度（无玻璃）MgO的实验值吻合较好。测量的杨氏模量和零孔隙率下的剪切模量分别为每平方厘米30•50和12•90 × 1011达因。在mcps频率范围内，本文的工作结果与早期的工作结果进行了比较。
Abstract The elastic moduli of both single crystal and polycrystalline magnesia were determined in the kcps frequency range by a Forster-type resonance method. The values obtained at 25°C for single crystal are: c 11 = 28•92c 12 = 8•79 and c 44 = 15•46 × 1011 dynes per cm2. The calculated isotropic elastic moduli for polycrystalline MgO obtained from the single crystal compliances are in good agreement with experimental values measured on theoretical density (glass-free) MgO. The measured Young's modulus and shear modulus at zero per cent porosity are 30•50 and 12•90 × 1011 dynes per cm2, respectively. The results of the present work are compared with the earlier work in the mcps frequency range.