纖維上之鍍層對金屬基複合材料熱應力之影響

The Effect of Coating Film on The Thermal Stress of Metal Matrix Composite

蔡耀霆(Ao-Ting Cai)

指導教授 ： 何智廷

國立虎尾科技大學/工程學院/機械設計工程研究所/碩士(2015年)

https://doi.org/10.6827/NFU.2015.00064

摘要

在碳纖維強化金屬基複合材料中，由於碳纖維與金屬間有差異極大之熱膨脹係數，因而熱殘留應力會在製造複合材料時於冷卻當中被引起。通常此殘留熱應力之大，甚至可造成金屬機塑性變形，因而可知此殘留熱應力對複合材料性質因有顯著之影響。
在本研究中，使用銅及鎳用來電鍍碳纖維，以及以複合電鍍得到Cu, Ni鍍層材料。鋁基及錫-鉛合金複合材料乃用擠壓鑄造法來製造。當鍍層材料之熱膨脹係數增加時，複合材料中殘留熱應力將會減少。當增加鍍層厚度時，殘留熱應力將會減少。

關鍵字

殘留熱應力 ； 複合材料 ； 碳纖維 ； 鍍層 ； 金屬基

並列摘要

Owing to the large thermal expansion expansion mismatch in the fiber longitudinal direction between carbon fiber and metal matrix, the thermal stress can be induced during cooling from high temperature for composite fabrication. The thermal stress can be large enough to cause yielding in the matrix. these thermal stresses can have a substantial effect on the carbon fibers reinforced metal matrix composite's performance.
In this project, the Cu or Ni coating materials was used on coating carbon fiber. composite coating technique was used to get Cu/Al2O3 and Ni/Al2O3 coatings. the composite with aluminium and tin-lead matrix was fabricated by squeeze in composites generated during cooling decreased as the thermal expansion coefficient of the coating film increased. When the thickness of the coating was increased, the residual stress of the composite was decreased.

並列關鍵字

Residual thermal stress ； composite materials ； carbon fiber ； coating ； metal matrix

參考文獻

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