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Experimental Study on the Laser Transmission Joining of Polystyrene and Titanium
Pin Li1,2, Jing Li3, Wensheng Tan4
1School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200000, China. lip@ujs.edu.cn.
Materials (Basel, Switzerland)
|August 26, 2018
Summary
Oxygen plasma treatment of polystyrene (PS) is crucial for laser transmission joining with titanium. Combining this with laser-treated titanium yields the highest joint strength, demonstrating improved material compatibility and bond formation.
Area of Science:
- Materials Science
- Polymer Science
- Surface Engineering
Background:
- Laser transmission joining of dissimilar materials like polystyrene (PS) and titanium presents significant challenges due to poor interfacial compatibility.
- Effective surface modification strategies are essential to overcome these limitations and achieve robust joints.
Purpose of the Study:
- To investigate and compare the effectiveness of laser treatment on titanium and oxygen plasma treatment on polystyrene for laser transmission joining.
- To determine the optimal surface treatment combination for maximizing the joint strength between PS and titanium.
- To elucidate the underlying mechanisms responsible for enhanced joint strength.
Main Methods:
- Comparative analysis of laser treatment on titanium surfaces and oxygen plasma treatment on polystyrene (PS) surfaces.
- Laser transmission joining experiments were conducted using different surface treatment combinations.
- Evaluation of joint strength through tensile failure analysis.
- Investigation of joining mechanisms using micromorphology observation, contact angle and surface free energy measurements, and X-ray photoelectron spectroscopy (XPS).
Main Results:
- Polystyrene (PS) joining with titanium is only achievable when the PS surface is treated with oxygen plasma.
- The highest joint strength, reaching 6.5 MPa, was achieved when joining laser-treated titanium with oxygen plasma-treated PS.
- Interfacial failure was observed, with fine and uniform bubbles significantly enhancing joint strength.
- Surface treatments increased surface energy and compatibility, leading to the formation of Ti-C and Ti-O chemical bonds at the interface.
Conclusions:
- Oxygen plasma treatment of PS is a prerequisite for successful laser transmission joining with titanium.
- The synergistic effect of laser-treated titanium and oxygen plasma-treated PS optimizes interfacial compatibility and bond formation.
- The formation of Ti-C and Ti-O chemical bonds is critical for achieving high joint strength in PS-titanium laser transmission joints.
Keywords:
XPSchemical bondscontact anglelaser surface treatmentlaser transmission joiningoxygen plasma treatmentsurface free energyMore Related Videos
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