MECHANICAL-PROPERTIES AND SHORT-TERM INVIVO EVALUATION OF YTTRIUM-OXIDE-PARTIALLY-STABILIZED ZIRCONIA
MECHANICAL-PROPERTIES AND SHORT-TERM INVIVO EVALUATION OF YTTRIUM-OXIDE-PARTIALLY-STABILIZED ZIRCONIA
复制标题
DOI：
10.1002/jbm.820230105
复制
发表时间：
1989-01-01
期刊：
影响因子：
--
通讯作者：
PEILLE, CN
中科院分区：
文献类型：
--
作者：
CHRISTEL, P;MEUNIER, A;PEILLE, CN
氧化钇部分稳定氧化锆(YPSZ)是一种新型陶瓷材料，与氧化铝相比具有更好的韧性。其增韧机制与裂纹尖端发生的四方亚稳晶向单斜晶态的类马氏体相变有关。试验结果表明，YPSZ具有较高的抗弯强度(90 0~12 0 0 MN)、较低的杨氏S模数(2 0 0 GPA)和较高的韧性(KIC=9~10MN/m~3/2)。其平均晶粒度为0.5µm，表面粗糙度低至0.008微米。灭菌或在盐水溶液中室温老化100天不影响该材料的韧性。将冷等静压烧结制成的圆柱形YPSZ试件植入RAP的椎旁肌中，最长可达12周。通过定量组织形态计量学方法，参照氧化铝(ISO要求)对组织反应进行评估。YPSZ和氧化铝在种植体周围的膜厚度和细胞分布方面没有显著差异。
Yttrium-oxide-partially-stabilized zirconia (YPSZ) belongs to a new class of ceramics exhibiting an improved toughness when compared to alumina. The toughening mechanism is related to a martensitic-like transformation of tetragonal metastable grains into a monoclinic state occurring at the crack tip. Specific tests showed that YPSZ exhibited a high bending strength (900-1200 MPa), a low Young''s modulus (200 GPa), and a high toughness (KIC=9-10 MN/m3/2). Its average grain size of 0.5 .mu.m allow a surface roughness as low as 0.008 .mu.m. Sterilization or aging in saline solution at room temperature for 100 days did not affect the toughness of this material. Cylindrical YPSZ samples, manufactured by cold isostatic pressing and sintering, were implanted in the paraspinal muscles in the rap up to 12 weeks. The tissue reaction was evaluated with reference to alumina (ISO requirements) by means of quantitative histomorphometry. No significant differences were found between YPSZ and alumina for both the membrane thickness and cell distributions surrounding the implants.