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无铅建筑铝搪瓷的密着机理研究 总被引:1,自引:1,他引:0
采用扫描电子显微镜、电子探针等分析无铅建筑铝搪瓷界面的显微结构和元素分布,并结合铝搪瓷的密着强度,探讨了无铅建筑铝搪瓷的密着机理。结果表明,密着性能优良的无铅建筑铝搪瓷面存在铝元素与瓷釉元素相互扩散的中间过渡层;中间过渡层与金属铝的结合主要通过金属键来实现,中间过渡层与瓷釉层的结合主要是通过离子键和共价键来实现。 相似文献
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钢板覆铝搪瓷密着机理研究蒋伟忠(中国轻工总会玻璃搪瓷研究所200052)StudyofAdherenceMechanismofAlumium-CoatedSteelSheetEnamel¥JiangWeizhong(Glass&EnamelResea... 相似文献
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热水器搪瓷内胆具有使用寿命长、无毒无害以及高耐蚀等特点,得到了广泛的应用,可替代传统的不锈钢、热镀锌和塑料等材料制作的内胆。为了满足成型、焊接和涂搪等要求,制作搪瓷内胆的钢板必须具有高强度以及优良的成型性、焊接性和涂搪性。研究表明,含钛热轧高强钢中钛主要以碳化物和氮化物的形式存在,不仅具有优良的焊接性和涂搪性,在焊接过程中和高温烧成时由于钛的析出物能有效地抑制晶粒长大,保持较高的强度。通过优化碳、锰和钛等元素的匹配,开发了4个不同屈服强度级别(210 MPa,245 MPa,330 MPa和360 MPa)的热轧搪瓷钢板。 相似文献
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Two alternative approaches, enamelling and plasma spraying, were tested to deposit coatings made with two different bioactive glasses: the established Bioglass® 45S5, which is considered as a term of comparison, and the experimental BioK. The strong points and weaknesses of the two methods were highlighted. From the analysed samples, it resulted that the enamelling approach works well on thermally stable substrates and creates a strong bond, characterized by a compositional gradient, with alumina substrates. However, the coating thickness must be carefully controlled to limit the thermal residual stresses and the glass formulation should be designed to reduce the glass tendency to crystallize. Instead plasma spraying is suitable for any kind of substrate and is highly automatizable, but the equipment is relatively expensive and the coatings are likely to retain some defectiveness, which makes a post-deposition thermal treatment necessary. Both enamelling and plasma spraying may induce crystallization phenomena, depending on the glass formulation. The introduction of potassium oxide in the glass composition, such as in the BioK, may be useful to hinder the crystallization. 相似文献
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