不同喷砂条件对选择性激光熔覆钴铬合金金瓷结合强度影响的研究

doi:10.7518/hxkq.2018.05.014

摘要/Abstract

摘要：

目的研究不同的喷砂条件对选择性激光熔覆技术（SLM）制作的钴铬合金与瓷结合强度的影响。方法用SLM技术制得63个10 mm×10 mm×2 mm钴铬合金试件块,随机分9组（n=7）,采用不同Al₂O₃粒度（A1=50 μm,A2=100 μm,A3=150 μm）和不同压强（B1=0.2 MPa,B2=0.4 MPa,B3=0.6 MPa）进行喷砂处理。每组随机选取一个试件进行扫描电子显微镜（SEM）观察,其余试件上瓷后用万能测试机测定试件的金瓷结合强度并观察其断裂模式,运用SPSS 17.0软件分析数据。结果 A1B1、A1B2、A1B3、A2B1、A2B2、A2B3、A3B1、A3B2、A3B3组剪切强度分别为（27.22±0.95）、（27.58±0.47）、（26.80±0.71）、（27.54±0.78）、（30.75±0.43）、（26.93±0.88）、（28.18±0.93）、（29.55±0.57）、（28.11±0.91） MPa。不同粒度Al₂O₃喷砂组间剪切强度的差异有统计学意义（P<0.05）,不同压强喷砂组间剪切强度的差异有统计学意义（P<0.05）,不同颗粒和不同压强对剪切强度的大小有交互作用（P<0.05）。剪切实验后,全部试件均为混合断裂模式。结论在本实验条件下,SLM钴铬合金在0.4 MPa、100 μm的Al₂O₃颗粒喷砂后,金瓷结合强度最大。

关键词: 选择性激光熔覆技术, 喷砂, 金瓷结合强度

Abstract:

Objective To investigate the effect of different sandblasting conditions on the metal-ceramic bonding strength of Co-Cr alloy fabricated by selective laser melting (SLM) technology. Methods A total of 63 specimens of Co-Cr alloy fabricated by SLM were prepared and randomly divided into nine groups (n=7). Each group was treated with different powder particles (A1=50 μm, A2=100 μm, and A3=150 μm) and pressures (B1=0.2 MPa, B2=0.4 MPa, and B3=0.6 MPa) in sand-blasting. One sample was randomly selected from each group for microstructure observation by scanning electron microscope (SEM). Ceramic was fired at the center of the specimens. Metal-ceramic bonding strength was measured with universal testing machine. Results were statistically analyzed with SPSS 17.0 software. Results The mean bond strengths were as follows: Group A1B1: 27.22 MPa±0.95 MPa, Group A1B2: 27.58 MPa±0.47 MPa, Group A1B3: 26.80 MPa±0.71 MPa, Group A2B1:27.54 MPa±0.78 MPa, Group A2B2: 30.75 MPa±0.43 MPa, Group A2B3: 26.93 MPa±0.88 MPa, Group A3B1: 28.18 MPa±0.93 MPa, Group A3B2: 29.55 MPa±0.57 MPa, and Group A3B3: 28.11 MPa±0.91 MPa. The particle factor of Al₂O₃ and the pressure factor of blasting showed statistical significance (P<0.05). An interaction was observed between the factors of particle and pressure (P<0.05). Mixed fracture mode of all specimens was observed after the shear strength test. Conclusion In conclusion, metal-ceramic bonding strength reaches the maximum when specimens are sandblasted with 100 μm alumina oxide at 0.4 MPa pressure.

Key words: selective laser melting, sandblasting, metal-ceramic bonding strength

中图分类号:

R783.2

喻茜茜,郭菁,朱洪水. 不同喷砂条件对选择性激光熔覆钴铬合金金瓷结合强度影响的研究[J]. 华西口腔医学杂志, 2018, 36(5): 539-543.

Qianqian Yu,Jing Guo,Hongshui Zhu. Effect of different sandblasting conditions on the metal-ceramic bonding strength of Co-Cr alloy fabricated by selec-tive laser melting technology[J]. West China Journal of Stomatology, 2018, 36(5): 539-543.

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变异来源	Ⅲ型平方和	df	均方	F值	Sig
压强	34.333	2	17.116	17.730	0.000
颗粒大小	17.500	2	8.750	9.037	0.001
压强*颗粒	15.782	4	3.946	4.705	0.008