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关于较硬样品的模量测算

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Answered (Verified) This post has 1 verified answer | 3 Replies | 2 Followers

Top 75 Contributor
11 Posts
Points 139
wang zengze posted on Mon, May 14 2012 7:31 AM

在测算杨氏模量的时候，应该先找到比较硬的物体做力曲线来表征探针。然后再用去测量样品，但如果遇到比较硬的样品的时候比如达到几十甚至上百GPa的模量的样品的时候，怎么办？

应该用什么来表征探针先？

  • | Post Points: 14

Answered (Verified) Verified Answer

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Answered (Verified) Ang Li replied on Sat, May 19 2012 11:34 PM
Verified by Hao Sun

表征样品的选取和探针有关（须保证样品变形相对于悬臂梁的弯曲可以忽略不计，理论上最硬的样品最好），一般都是用sapphire来表征探针。对于上百GPa模量样品，一般选用金刚石的探针，这种探针一般都已经标定过了，不用再表征。

  • | Post Points: 13

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Top 10 Contributor
129 Posts
Points 1,429
Reply
Answered (Verified) Ang Li replied on Sat, May 19 2012 11:34 PM
Verified by Hao Sun

表征样品的选取和探针有关（须保证样品变形相对于悬臂梁的弯曲可以忽略不计，理论上最硬的样品最好），一般都是用sapphire来表征探针。对于上百GPa模量样品，一般选用金刚石的探针，这种探针一般都已经标定过了，不用再表征。

  • | Post Points: 13
Top 75 Contributor
11 Posts
Points 139
Reply
wang zengze replied on Sun, May 20 2012 8:14 PM

我们实验室中有一根DNISP的针，只标了S/N：11925414，请问可以查到它标定好的参数吗？

  • | Post Points: 10
Top 10 Contributor
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Bruker Employee
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Hao Sun replied on Mon, May 21 2012 3:15 AM

Peak Force QNM的测量范围是0.7MPa到70GPa。超过这个范围会不准，超过10GPa的请用金刚石探针做。不是普通的DNISP探针，是用力常数大约350N/m的DNISP-HS 探针。探针会配有说明，里边详细写了探针参数。

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