Bonding strengths of titania sol-gel derived coatings on titanium
Bonding strengths of titania sol-gel derived coatings on titanium
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DOI：
10.1023/a:1008684815735
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发表时间：
1998-03-01
影响因子：
2.5
通讯作者：
Kangasniemi, IMO
中科院分区：
文献类型：
--
作者：
Patsi, ME;Hautaniemi, JA;Kangasniemi, IMO
生物活性陶瓷涂层与基材的结合力较差。研究了二氧化钛凝胶涂层与钛基材的结合强度(拉伸强度)。实验中采用了氢氧化钠腐蚀、等离子体清洗和氮化钛涂层三种不同的前处理方法。研究了加热温度、真空加热和钛表面粗糙度对钛表面形貌的影响。戊酸的加入改变了溶胶的性质。用扫描电子显微镜、俄歇电子能谱、原子力显微镜对样品进行了分析，并用粘结强度计进行了测试。钛表面在氢氧化钠中预腐蚀1h，氮化钛预沉积或研磨后，二氧化钛涂层的结合强度提高到24 Mpa以上。在这些样品中，在胶涂层界面处发生了断裂。
Bioactive ceramic coatings have had poor adhesion to substrate. In this study, the bond strength (tensile strength) of titania gel coating to titanium substrate was studied. In the experiments three different pretreatments were used, namely sodium hydroxide corroding, plasma cleaning and titanium nitride coating. Also the effects of heating temperature, heating in vacuum and titanium surface roughness were studied. The sol properties were altered with valeric acid addition. Samples were analysed by SEM-EDX, AES, AFM and tested by bond strength gauge. Those samples in which the titanium surface was precorroded one hour in sodium hydroxide, predeposited by titanium nitride or ground improved the bonding strengths of titania coatings to over 24 MPa. In these samples a fracture occurred at the glue-coating interface.