摘要
目的：测试自行研制的耐火代型材料的主要常温性能、凝固时间和常温抗压强度。方法：采用自制维氏针，测出粉液比分别为８∶１、７．５∶１、６．５∶１、６∶１时调拌耐火代型材料的凝固时间；并制作自然干燥１、２、８、２４、７２小时及在１０００℃反复烧结４次的抗压测试样本，测试各组试件常温下的抗压强度值。结果：①凝固时间为１６．２５分（７．５∶１，常温），粉液比减小凝固时间延长（Ｐ＜０．０１）。②常温抗压强度为２５．３２ＭＰａ（干燥２４小时），随时间的延长常温抗压强度增大（Ｐ＜０．０１），残留强度为２４ＭＰａ。结论：自行研制的钛合金粉浆涂塑底层冠用耐火代型材料（基础型）的主要常温性能完全可以满足钛合金粉浆涂塑底层冠的应用要求。
Objective: The refractory die is the precondition for developing slip casting core of sintered powder. This study is to determine the normal temperature properties of the refractory die material compatible with slip casting core. Methods: to mix the die material at five different ratios (8/1, 7.5/1, 7/1, 6.5/1, and 6/1) and measure their solidification time with self manufactured Vicker's needle; to prepare five cylindrical specimens (Φ10×15mm) in different drying time for determining their compressive strength, and then to let another five specimens fire at 1000℃ four times for measuring the residual compressive strength at room temperature. Results: The setting time was 16.25 minutes (7.5/1), and the lower the powder liquid ratio, the longer the setting time. The normal compressive strength was 25.32 MPa (drying 24 hours), while the longer the drying time, the higher the compressive strength achieved (P<0.01). The residual compressive strength was 24 MPa. Conclusion: The normal temperature properties of the refractory die material meet the demand of slip casting core of sintered powder.
出处
《华西口腔医学杂志》
CAS
CSCD
北大核心
1999年第2期159-162,共4页
West China Journal of Stomatology
基金
国家自然科学基金
关键词
耐火代型
粉浆涂塑
涂塑底层冠
钛合金
powder metallurgy\ \ slip casting\ \ refractory die\ \ solidification time\ \ compressive strength
