本實驗以擠壓鑄造製程製作高導熱係數石墨-鋁基複合材料，當石墨溫 度 550℃，鋁湯 溫度 750℃時，以 50MPa 的壓力擠鑄，可得幾無氣孔的高 導熱係數鋁基複合材料，根據石墨比例的不同，可調製不同導熱係數的複 合材料，實驗結果整理如下：
1. 當石墨全為顆粒狀時，其體積分率僅為43.6％，當將顆粒狀石墨置換成 95％的鱗狀石墨與 5％顆粒狀石墨時，可得到石墨體積分率達 74.6％。
2.經由石墨體積分率的增加，當體積分率達到74.6％時，複合材料的熱傳導 係數可提升至263.1W/mK，為 A356 鋁基材導熱係數 128W/mK 的兩倍之 多。
3.擠壓鑄造製成的石墨-鋁基複合材料，經由X-ray 繞射分析，無明顯的 Al4C3 訊號，可見由於反應時間短，產生的Al4C3量相當少，因此對熱傳導係數 應幾無影響。
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