Oda Y, Nakanishi K, Sumii T
Tokyo Dental College.
Bull Tokyo Dent Coll. 1990 Feb;31(1):47-52.
The effects of added copper powder to the properties of the sintered titanium alloys were investigated by measuring the compressive strength and densities of the green and sintered compacts, the thermal expansion curves and dimensional changes in the sintered compacts, and the accuracy of the crown-type restorations. The compressive strengths of green compacts ranged from 55 to 75 MPa. The expansion of green compacts increased with increased copper content. The sintered density was lower than the green density. The compressive yield strength of sintered compacts ranged from 260 MPa to 410 MPa. The sintered compacts expanded from 0.35% to 1.03% and the expansion increased with increased copper content. The dimensional accuracy of crown-type restorations showed the same dimensional change tendencies as did the sintered compacts. These results showed that the fit and the strength of sintered titanium alloy restorations could be improved.
通过测量生坯和烧结体的抗压强度及密度、烧结体的热膨胀曲线和尺寸变化以及冠型修复体的精度，研究了添加铜粉对烧结钛合金性能的影响。生坯的抗压强度范围为55至75MPa。生坯的膨胀随着铜含量的增加而增大。烧结密度低于生坯密度。烧结体的抗压屈服强度范围为260MPa至410MPa。烧结体膨胀了0.35%至1.03%，且膨胀随着铜含量的增加而增大。冠型修复体的尺寸精度显示出与烧结体相同的尺寸变化趋势。这些结果表明，烧结钛合金修复体的贴合度和强度可以得到改善。
