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前言陶瓷有比钢铁、铜大许多倍的比弹性模量,又具有高硬度,优良的耐磨性、耐蚀性和耐高温性能,因此广泛应用于耐火器材、绝缘器材及生活用品上。但由于它的高脆性,不耐冲击,所以在结构机械,动力机械制造上的应用受到很大限制。随着各种机械向轻质、高速度、高精度、高寿命方向的发展,陶瓷的特殊优点愈来愈吸引着广大的研究者,陶瓷增韧及利用金属材料的优良韧性来克服它的脆性的研究都取得一定的进展。采用气喷法和等离子射流喷镀法向金属表面熔射薄层陶瓷,形成结合力强,致密的表面薄膜也取得了很大的进展,但是有关陶瓷层的结构,及与金属基体的结合等方面的研究,尚见不多。这些研究对金属表面喷镀陶瓷层的开发和工业应用无疑是非常重要的。根据以上考虑,本研究采用精密机械上应用的含铬镍硅合金元素的低膨胀合金铸铁作基体,熔射厚度为0.35～0.42mm的Al_2O_3+SiO_2陶瓷层,并进行了与生产应用有关的组织结构研究及性能的测定,取得必要的结果。
Preface Ceramic than steel, copper many times the elastic modulus, but also has high hardness, excellent wear resistance, corrosion resistance and high temperature performance, it is widely used in fire-resistant equipment, insulation materials and daily necessities. However, due to its high brittleness, impatience impact, so in the structural machinery, power machinery manufacturing applications have been greatly limited. With the development of various machines towards light weight, high speed, high precision and high life expectancy, the special advantages of ceramics are increasingly appealing to researchers, ceramic toughening and utilizing the excellent toughness of metal materials to overcome its brittleness The research has made some progress. The use of gas jet method and plasma jet spray method to the surface of the metal thin layer of ceramic spray to form strong, dense surface film has made great progress, but the ceramic layer structure, and the combination with the metal matrix Aspects of research, still not much. These studies are undoubtedly important for the development and industrial application of ceramic coatings on metal surfaces. Based on the above considerations, this study used a low-expansion alloy cast iron containing chrome-nickel-silicon alloy of precision machinery as a substrate, a layer of Al 2 O 3 + SiO 2 with a thickness of 0.35-0.42 mm and a structure related to production and application Structure research and performance measurement, to obtain the necessary results.