Spontaneous emission of charged particles and photons during tensile deformation of oxide-covered metals under
Spontaneous emission of charged particles and photons during tensile deformation of oxide-covered metals under
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氧化物覆盖金属在拉伸变形过程中带电粒子和光子的自发发射
DOI：
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发表时间：
1977
期刊：
影响因子：
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通讯作者：
L. Himmel
中科院分区：
文献类型：
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作者：
B. Rosenblum;P. Braunlich;L. Himmel
使用电子管型探测器和磁鉴别技术，已经证明，当氧化物覆盖的金属（如Al和Ni）在完全黑暗的大约10−10 Torr的真空中以拉伸模式变形时，电子、正离子和负离子以及光子都自发发射。对于高纯度Al衬底上给定厚度的致密阳极生长Al2O3膜，发现所有带电粒子和光子的发射产额都表现出相同的应变依赖性。这同样适用于Ni上的致密热生长NiO膜。它的结论是从这些和其他观察，整个发射光谱同时产生的结果，在变形过程中的氧化膜中的裂纹的形成和传播。这种类型的摩擦引起的排放以前提出的模型的缺点被指出，并提供了一些替代的建议，关于排放机制。
Using Channeltron‐type detectors and magnetic discrimination techniques, it has been shown that electrons, positive and negative ions, and photons are all emitted spontaneously while oxide‐covered metals such as Al and Ni are being deformed in a tensile mode in a vacuum of approximately 10−10 Torr in total darkness. For dense anodically grown Al2O3 films of a given thickness on high‐purity Al substrates, the emission yields of all charged particles and photons are found to exhibit identically the same strain dependence. The same applies to compact thermally grown NiO films on Ni. It is concluded from these and other observations that the entire emission spectrum is generated simultaneously as a result of the formation and propagation of cracks in the oxide film during the deformation process. The shortcomings of previously proposed models for this type of triboinduced emission are pointed out, and some alternative suggestions regarding the emission mechanism are offered.