论文部分内容阅读
采用Ｘ线检查锆英石作为铸型内包埋料时片状钛铸件的气孔率，并用光镜和扫描电镜观察反应层结构。同时，采用ＥＤＡＸ分析了包埋料中的元素在钛铸件表面的分布。结果表明：钛铸件的气孔率为１．２１％；反应层厚度为５０μｍ，其结构从内向外可分为５层：烧结层、α层、富Ｓｉ层、针状结晶层和氧扩散层，且包埋料中的元素在各层含量也不同。尽管如此，用经过特殊工艺处理的锆英石作铸钛的内包埋料，铸出的钛铸件表面呈橙黄色，光滑无裂纹，铸件表面的包埋料只需用简单的振动法即可去除。制作的冠、桥及义齿支架适合性好，能满足临床需要
The porosity of the flake-like titanium castings was determined by X-ray examination of zircon embedded in the mold. The structure of the reaction layer was observed by light microscopy and scanning electron microscopy. At the same time, EDAX was used to analyze the distribution of the elements in the embedded material on the surface of titanium casting. The results show that the porosity of titanium casting is 1.21% and the thickness of reaction layer is 50μm. The structure of the layer can be divided into five layers from the inside to the outside: sintered layer, α layer, Si-rich layer, acicular crystal layer and oxygen diffusion layer, And the content of the embedded material in each layer is also different. In spite of this, with a special process of zirconia as the inner embedded material of titanium, cast titanium castings were orange-yellow surface, smooth and crack-free, castings on the surface of the castings can be removed by simple vibration method. Production of the crown, bridge and denture stent good fit, to meet the clinical needs