Barkhausen noise analysis (BNA) is a distinctive measure for testing microscopic stresses and metallurgical structure in ferromagnetic materials.
巴氏噪声分析(BNA)是一种检测铁磁材料微观应力及金相组织的独特方法。
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With coat section metallographic, X-ray diffraction and scanning electrical mirror analysis method, have studied coat microscopic shape look, organization structure and the coating's composition.