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首页> 外文会议>World Foundry Congress vol.1; 20040906-09; Istanbul(TR) >EFFECTS OF ZIRCONIUM ADDITION ON EXPANSION BEHAVIOR OF DENTAL INVESTMENT MATERIALS FOR TITANIUM INVESTMENT CASTING
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EFFECTS OF ZIRCONIUM ADDITION ON EXPANSION BEHAVIOR OF DENTAL INVESTMENT MATERIALS FOR TITANIUM INVESTMENT CASTING

机译：锆添加对钛系合金铸造牙科材料膨胀性能的影响

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摘要

Thermal and setting expansion behavior of alumina based phosphate-bonded investment in titanium castings was investigated in terms of a variation of Zr content and heat treatment conditions in order to understand the fitness of denture frame. The chemical composition of filer materials was varied to make out the effect of setting expansion. Based on experimental results obtained, it is revealed that setting expansion is not influenced by the content of filler material Zr. However, thermal expansion was observed to display a marked increase with increasing content of Zr metal powder. In contrast, undersized denture castings were produced when the total expansion (thermal + setting) of investment material was insufficient to 0.25% or an investment was contracted through the casting process. When the amount of expansion of investment material was excessive(1.1%), fitness was found to be unsuitable between master model and denture castings. The best condition on fitness between titanium casting and investment material was obtained to 0.7-0.8% of total expansion in order to make a denture frame using investment casting method.
机译：为了了解义齿框架的适用性，研究了Zr含量和热处理条件的变化，研究了钛基铸件中氧化铝基磷酸盐键合铸件的热膨胀定形行为。改变过滤嘴材料的化学组成以体现凝固膨胀的效果。根据获得的实验结果，揭示了设置膨胀不受填充材料Zr的含量的影响。然而，观察到热膨胀随着Zr金属粉末含量的增加而显示出明显的增加。相反，当投资材料的总膨胀（热+凝固）不足至0.25％或通过铸造工艺收缩投资时，就会生产出尺寸较小的假牙铸件。当投入材料的膨胀量过多（1.1％）时，发现母模和假牙铸件之间不适合。为了使用熔模铸造方法制作义齿架，使钛铸件和熔模材料之间的最佳适应度达到总膨胀的0.7-0.8％。

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