摘要
以钾长石、碳酸钾和氧化锆为主要原料,通过高温固相法一次性合成氧化锆/白榴石复合烤瓷材料。利用电子万能试验机测试样品的力学性能,利用SEM、XRD、Raman、EDX和热膨胀仪测试样品的形貌、物相、组成和热膨胀系数。结果表明,样品的弯曲强度为110MPa、断裂韧性为3.5MPa/m1/2、金瓷结合强度为45MPa;在样品中同时存在白榴石和氧化锆两种晶相,这既有利于增强烤瓷材料的力学性能,又有助于调节烤瓷材料的膨胀系数(约为13.73×10-6/K),使其与牙用镍铬合金相匹配;同时,在金瓷界面存在镍铬合金中的元素向烤瓷材料的扩散,形成扩散型和化合型界面,这有利于增强金瓷结合强度。
The dental zirconia-leucite composites were synthesized by high temperature solid-state method using potassium feldspar, potassium carbonate and zirconium oxide as raw materials. All the samples were analyzed by using scanning electron microscope （SEM）, X-ray diffractometer （XRD）, Raman spectrometer, and Energy dispersive X-ray spectrometer （EDX）. The mechanical properties and the coefficient of thermal expansion of the samples were also measured. The average bending strength, the fracture toughness and the metal-ceramic bonding strength of the samples were 110 MPa, 3.5MPa/m1/2 and 45MPa, respectively. The results also indicate that zirconium oxide and leucite in the samples are not only beneficial to the mechanical properties but also favorable to the expansion coefficient of the ceramic material （～ 13.73 × 10^-6/ K） to match with that of the Ni-Cr dental alloy. The increase of the metal-ceramic bonding strength is resulted from the formation of the diffusion-type and combination-type interfaces due to the mutual diffusion of elements in the metal-ceramic interfaces.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2009年第4期518-522,共5页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目(10476024)
四川省教育厅资助项目(2006A094)
西南科技大学资助项目(08zxxp10)
关键词
氧化锆
白榴石
金瓷结合
热膨胀系数
力学性能
zirconia
leucite
metal-ceramic bonding strength
thermal expansion coefficient
mechanical property
作者简介
康明（1965-），男，副教授，博士研究生，研究方向：无机发光材料。E-mail：kangm9690@163．com。
通讯作者：尹光福（1961-），男，博士，教授。E-mail：nic0700@scu．edu．cn．
