研究目的
Investigating the method of forming a tungsten layer on graphite for use in the anode of powerful x-ray tubes for medical purposes, specifically for computed tomography scanners.
研究成果
The CVD method for forming a tungsten layer on graphite is effective for creating anodes for x-ray tubes in computed tomography scanners, offering high thermal and mechanical stability under high-intensive, alternating loads.
研究不足
The study focuses on the thermal and mechanical properties of the tungsten-graphite interface but may not address all potential operational challenges in a clinical CT scanner environment.
1：Experimental Design and Method Selection:
The formation of a tungsten layer on the graphite surface was performed by CVD (chemical vapor deposition). The reaction of tungsten hexafluoride with hydrogen was used.
2：Sample Selection and Data Sources:
Graphite samples were used as the substrate for tungsten deposition.
3：List of Experimental Equipment and Materials:
Tungsten hexafluoride and hydrogen were used as starting materials. A tensile testing machine was used for adhesion tests.
4：Experimental Procedures and Operational Workflow:
The deposition process was carried out at the atomic level to achieve a refractory material with high density. The quality of adhesion and the structure of the deposited coating were analyzed.
5：Data Analysis Methods:
The thermal linear expansion coefficients of materials were identified by dilatometry. Internal mechanical stresses were calculated using Lame equations.
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