Mechanical properties and porcelain bond strength of a new domestic CoCr alloy based on selected laser melting

Qiuxu XIANG; Lu WANG; Fabin TAN

doi:10.16016/j.1000-5404.201810080

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Mechanical properties and porcelain bond strength of a new domestic CoCr alloy based on selected laser melting

Biomedical Engineering | 更新时间：2026-01-09

- Mechanical properties and porcelain bond strength of a new domestic CoCr alloy based on selected laser melting
- Journal of Third Military Medical University Vol. 41, Issue 5, Pages: 502-506, 封三(2019)
- 作者机构：
  
  1.400015 重庆，重庆医科大学附属口腔医院:修复科
  2.400015 重庆，口腔疾病与生物医学重庆市重点实验室
  3.400015 重庆，重庆市高校市级口腔生物医学工程重点实验室
  4.400015 重庆，重庆医科大学附属口腔医院:修复工艺科
- 作者简介：
- 基金信息：
  
  the National Key R&D Program of China(2016YFC1100503);the Scientific Research Project of Chongqing Health and Family Planning Commission(2018MSXM061);the Science and Technology Research Program of Chongqing Municipal Education Commission(KJQN201800421);the Project for Innovation Team Construction of Higher Education in Chongqing(CXTDG201602006)
- DOI：10.16016/j.1000-5404.201810080
  CLC： R783.1
- Received：15 October 2018，
  
  Revised：2018-12-19，
  
  Published：15 March 2019
- 稿件说明：
移动端阅览
Qiuxu XIANG, Lu WANG, Fabin TAN. Mechanical properties and porcelain bond strength of a new domestic CoCr alloy based on selected laser melting[J]. Journal of Third Military Medical University, 2019, 41(5): 502-506, 封三.
DOI：

Qiuxu XIANG, Lu WANG, Fabin TAN. Mechanical properties and porcelain bond strength of a new domestic CoCr alloy based on selected laser melting[J]. Journal of Third Military Medical University, 2019, 41(5): 502-506, 封三. DOI： 10.16016/j.1000-5404.201810080.

摘要

目的

评估基于选区激光融化(selective laser melting，SLM)技术的国产CoCr合金试件的机械性能和金瓷结合强度。

方法

采取SLM技术和铸造法构造哑铃试件(0°，45°和90°)和金瓷结合试件。在室温下进行拉伸实验并观察断面形貌；通过三点弯测试检测金瓷结合强度并分析金瓷界面特征。

结果

铸造组、国产SLM组和进口SLM组的弹性模量、抗拉强度和断后伸长率间有统计学差异(

0.05)；SLM组中，不同构造角度间的弹性模量、抗拉强度和断后伸长率之间无统计学差异；金瓷结合强度方面，铸造组[(30.78±3.23)MPa

]

，进口SLM组[(39.31±3.32)MPa

]

、国产SLM组[(53.89±5.60)MPa

]

3组间差异有统计学意义(

0.05)。

结论

国产SLM组能获得与进口SLM组相当的机械性能；国产SLM组的金瓷结合强度优于进口SLM组和铸造组，能满足临床使用的需求。

Abstract

Objective

To evaluate the mechanical properties and porcelain bond strength of domestic CoCr alloy specimens based on selected laser melting (SLM) technology.

Methods

SLM technology was used to construct dumbbell specimens (0°

45° and 90°) and ceramic specimens. The cast specimens of the same size were made by traditional casting method. Tensile test was carried out at room temperature and the shape of the microstructure was observed. The porcelain bond strength was measured by a three-point bend test

and the metal-ceramic interface was observed by scanning electron microscopy.

Results

There were significant differences in mechanical properties (including elastic modulus

tensile strength and elongation) among the casting group

the domestic SLM group and the imported SLM group (

0.05). In the SLM group

there was no significant difference in elastic modulus

tensile strength and elongation among different fabricated angles. The porcelain bond strength of casting group was 30.78±3.23 MPa

which was lower than that in the imported SLM group (39.31±3.32 MPa) and the domestic SLM group (53.89±5.60 MPa

0.05).

Conclusion

The domestic SLM group obtains the similar mechanical properties to the imported SLM group. It has higher bonding strength than the other 2 groups

and can meet the needs of clinical use.

关键词

Keywords

references

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