State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China.
J Biomed Mater Res B Appl Biomater. 2010 Apr;93(1):39-50. doi: 10.1002/jbm.b.31556.
The diffusion bonding of Ti-6Al-4V and Co-Cr-Mo dental alloys has been investigated in terms of the atoms diffusion, the microstructure evolution, and the bonding strength. The bonding performance reveals asymmetry diffusion profiles for both the Co and Cr in Ti-6Al-4V and the Ti in Co-Cr-Mo alloy. Their diffusion coefficients (Arrhenius relations) have been established based on the experiments. Co and Cr diffusion into Ti-6Al-4V leads to alpha --> beta transformation and the intermetallics-formation. Maximum bonding strength occurs at about 840 degrees C. The bonding joint fails under the shear stress in the Ti-6Al-4V side near the bonding interface in brittle manner. The intermetallics in the diffusion layer together with the unbonded areas and other flaws in the bonding interface are responsible for the shear brittle fracture, which also weaken the bonding strength.
钛-6 铝-4 钒和 Co-Cr-Mo 牙科合金的扩散键合已在原子扩散、微观结构演变和键合强度方面进行了研究。结合性能揭示了 Co 和 Cr 在 Ti-6Al-4V 中以及 Ti 在 Co-Cr-Mo 合金中的不对称扩散分布。根据实验建立了它们的扩散系数（阿累尼乌斯关系）。Co 和 Cr 扩散到 Ti-6Al-4V 中会导致 alpha --> beta 转变和金属间化合物的形成。最大键合强度出现在约 840°C。键合接头在键合界面附近的 Ti-6Al-4V 侧在剪切应力下以脆性方式失效。扩散层中的金属间化合物以及键合界面上的未键合区域和其他缺陷导致了剪切脆性断裂，这也削弱了键合强度。
