反复熔铸对非镍基烤瓷合金金瓷结合性能的影响

发布时间：2018-08-18 07:49

【摘要】：目的：研究反复熔铸对钴铬、纯钛、钯基、金铂4种非镍基烤瓷合金金瓷结合强度、金瓷断裂方式和金瓷界面的影响。方法：(1)从厂家购买的4种非镍基烤瓷合金在真空加氩气保护环境下，不添加新合金熔铸1～3次，形成金属基底，上瓷，获得I代～III代试件，随机选取一半试件进行冷热循环试验，，剪切试验方法测试试件的金瓷结合强度。体式显微镜观察剪切试验后试件的金属断裂面，对其断裂方式进行分类；(2)扫描电镜观察4种烤瓷合金试件的金瓷界面形貌，能谱仪检测金瓷界面的元素扩散宽度。结果：(1)4种烤瓷合金经1～3次熔铸，金瓷结合强度差异无统计学意义（P＞0.05）。钴铬、钯基和金铂烤瓷合金冷热循环后金瓷结合强度差异无统计学意义（P＞0.05），纯钛烤瓷合金冷热循环后的金瓷结合强度下降，且差异有统计学意义（P＜0.05）。反复熔铸烤瓷合金与冷热循环两因素在金瓷结合强度方面无交互作用（P＞0.05）。（2）4种烤瓷合金经1～3次熔铸后，其金瓷断裂方式无显著差异（P＞0.05）。钴铬、纯钛烤瓷合金的试件主要表现为粘结断裂，少数为混合断裂；钯基烤瓷合金试件全部表现为混合断裂，金铂烤瓷合金主要表现为混合断裂，少数为内聚断裂，对比4种烤瓷合金的金瓷结合强度值与断裂方式，二者间无关联。（3）经1～3次熔铸后，钴铬烤瓷合金金瓷界面形貌I代、II代间无显著变化，III代界面处局部出现缺陷；纯钛、钯基、金铂烤瓷合金I代～III代试件的金瓷界面形貌无显著变化。经1～3次熔铸后，4种烤瓷合金金瓷界面元素扩散宽度无显著变化；III代钯基烤瓷合金氧化层的Ga元素峰值较I代、II代低。结论：在真空加氩气保护环境下，反复熔铸钴铬、纯钛、钯基、金铂烤瓷合金1～3次，金瓷结合强度、断裂方式、金瓷界面元素扩散宽度无显著变化，冷热循环试验对钴铬、钯基、金铂烤瓷合金金瓷结合强度无显著影响，但纯钛烤瓷合金金瓷结合强度显著降低；熔铸1～3次的纯钛、钯基和金铂烤瓷合金和熔铸1～2次的钴铬烤瓷合金的金瓷界面形貌无显著变化，熔铸3次的钴铬烤瓷合金金瓷界面局部出现缺陷。
[Abstract]:Aim: to study the effects of repeated melting casting on the metal-porcelain bonding strength, fracture mode and metal-porcelain interface of four kinds of non-nickel based porcelain alloys, namely cobalt chromium, pure titanium, palladium and gold platinum. Methods: (1) four kinds of non-nickel-base porcelain alloys purchased from manufacturers were melted and cast 1 / 3 times without adding new alloy in vacuum and argon protection environment. Half of the specimens were selected randomly for the cold and hot cycle test, and the shear test method was used to test the metal-ceramic bonding strength of the specimens. The fracture surface of the specimens after shear test was observed by type microscope, and the fracture modes were classified. (2) scanning electron microscope (SEM) was used to observe the morphology of the metal-ceramic interface of the four kinds of ceramic alloy specimens, and the diffusion width of the elements at the interface of the metal-porcelain interface was measured by energy spectrometer. Results: (1) there was no significant difference in the bonding strength of 4 kinds of porcelain alloy (P > 0.05). There was no significant difference in the bonding strength of cobalt chromium, palladium base and platinum alloy after cold and hot cycling (P > 0.05), but the bonding strength of pure titanium porcelain alloy decreased after cold and hot cycling (P < 0.05). There was no interaction between the two factors (P > 0. 05). (2). After 1 or 3 times of melting and casting, there was no significant difference in the fracture mode of four kinds of porcelain alloy (P > 0. 05). Co-Cr, pure titanium porcelain alloy mainly shows bond fracture, a few is mixed fracture, palladium base porcelain alloy specimen is mixed fracture, gold platinum alloy is mainly mixed fracture, a few is cohesive fracture. There was no correlation between the strength of metal-porcelain bonding and fracture mode of four kinds of ceramic alloy. (3) after 1 or 3 times of melting, there was no significant change in the interface morphology of Co-Cr alloy between generations I and II, and there were some defects at the interface of generation III, pure titanium, and pure titanium. There was no significant change in the interface morphology of Pd-based, gold-platinum ceramic alloy. After 1 ~ 3 times of melting and casting, the diffusion width of the elements at the interface of the four kinds of porcelain alloy was not significantly changed. The Ga peak value of the oxidation layer of the Palladium based ceramic alloy of generation III was lower than that of the generation I and II. Conclusion: under the condition of vacuum and argon protection, cobalt and chromium, pure titanium, palladium base and gold platinum porcelain alloy were repeatedly melted for one or three times. The bonding strength, fracture mode, diffusion width of elements at the interface of metal and porcelain were not significantly changed, and the cold and hot cycling tests were carried out on cobalt chromium. The bonding strength of Pd-based, gold-platinum porcelain alloy was not significantly affected, but the metal-porcelain bonding strength of pure titanium porcelain alloy decreased significantly. The interface morphology of Pd-base and gold-platinum ceramic alloy and Co-Cr alloy with 1 and 2 times of melting cast has no significant change, but the defects of the interface of the alloy with 3 times of melting cast are observed. The results show that there is no obvious change in the interface between the alloy and the alloy, and the defects occur in the interface of the alloy.
【学位授予单位】：福建医科大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：R783.6

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