Effect of SiC particles on crack susceptivity in laser direct forming Al2O3 ceramic

WU Dong-jiang; YANG Ce; WU Nan; GUO Yu-quan; MA Guang-yi; GUO Dong-ming

doi:10.3788/OPE.20122007.1551

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Effect of SiC particles on crack susceptivity in laser direct forming Al₂O₃ ceramic

更新时间：2020-08-12

- Effect of SiC particles on crack susceptivity in laser direct forming Al₂O₃ ceramic
- Optics and Precision Engineering Vol. 20, Issue 7, Pages: 1551-1558(2012)
- 作者机构：
  
  大连理工大学精密与特种加工教育部重点实验室,辽宁大连,116023
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20122007.1551
  CLC： TG665;TN249
- Received：24 February 2012，
  
  Revised：17 April 2012，
  
  Published Online：10 July 2012，
  
  Published：10 July 2012
- 稿件说明：
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吴东江, 杨策, 吴楠, 郭玉泉, 马广义, 郭东明. SiC颗粒掺杂对激光直接成形Al2O3陶瓷裂纹敏感性的影响[J]. 光学精密工程, 2012,20(7): 1551-1558

WU Dong-jiang, YANG Ce, WU Nan, GUO Yu-quan, MA Guang-yi, GUO Dong-ming. Effect of SiC particles on crack susceptivity in laser direct forming Al2O3 ceramic[J]. Editorial Office of Optics and Precision Engineering, 2012,20(7): 1551-1558
吴东江, 杨策, 吴楠, 郭玉泉, 马广义, 郭东明. SiC颗粒掺杂对激光直接成形Al2O3陶瓷裂纹敏感性的影响[J]. 光学精密工程, 2012,20(7): 1551-1558 DOI： 10.3788/OPE.20122007.1551.

WU Dong-jiang, YANG Ce, WU Nan, GUO Yu-quan, MA Guang-yi, GUO Dong-ming. Effect of SiC particles on crack susceptivity in laser direct forming Al2O3 ceramic[J]. Editorial Office of Optics and Precision Engineering, 2012,20(7): 1551-1558 DOI： 10.3788/OPE.20122007.1551.

摘要

为抑制激光直接成形Al

陶瓷过程中的裂纹

利用SiC未熔颗粒的增韧原理

在Ti-6Al-4V合金基底上进行添加SiC颗粒的Al

同轴送粉激光直接成形实验

分析了激光直接成形Al

+SiC复相陶瓷的可行性以及成形件裂纹敏感性的影响因素。利用光学显微镜观察薄壁成形试样的裂纹扩展、显微组织和两相结合情况

并使用X射线衍射仪(XRD)进行相分析。结果表明:SiC颗粒可在激光直接成形Al

+SiC陶瓷中起到抑制裂纹的作用

并可形成各成分结合良好

无明显化学反应

含有较完整SiC未熔颗粒的复相陶瓷材料。单因素实验显示:SiC比例

、激光功率

、扫描速度

和送粉率

对裂纹敏感性均有显著影响

最后采用工艺参数:

=10%(重量百分比)、

=186 W、

=300 mm/min及

=1.78 g/min成形了裂纹敏感性低

无明显缺陷的长×高×厚约为17 mm×6 mm×2 mm的薄壁件。

Abstract

The toughening effect of SiC particles was applied to inhibition of the cracks in Al

ceramic for Laser Direct Forming (LDF). The experiments of coaxial laser cladding Al

ceramic added SiC particles were performed on the Ti-6Al-4V alloy substrate to investigate the feasibility of Al

+SiC composite ceramic by LDF and explore the factors effecting on the crack susceptivity. The cracks

microstructures and the combining of the two compositions were observed by an optical microscopy

and the phase transitions were detected by X-ray diffraction. The results show that some complete SiC particles contained in the Al

ceramic can inhibit the cracks

and the Al

+SiC composite ceramic without serious chemical reactions or combining defects can be prepared. The crack susceptivity is significantly affected by the proportion of SiC (

)

laser power (

)

scanning velocity (

) and the powder flow rate (

). Finally

a thin-wall Al

+SiC composite ceramic block(17 mm?6 mm?2 mm)without the obvious defects was formed with the parameters of

and

in 10%(weight proportion)

186 W

300 mm/min and 1.78 g/min

respectively.

关键词

Keywords

references

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