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頁籤選單縮合
題名 | 碳-鋁複合材料之製程、微結構與性質研究=Process, Microstructure and Properties of C/Al Composites |
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作者 | 陳剛毅; 陳瑾惠; 朱建平; | 書刊名 | 技術學刊 |
卷期 | 11:1 1996.03[民85.03] |
頁次 | 頁55-62 |
分類號 | 440.35 |
關鍵詞 | 金屬基複合材料; 碳纖維; 鋁; 擠壓鑄造; 磨耗; Metal matrix composite; Carbon fiber; Aluminum; Squeeze casting; Wear; |
語文 | 中文(Chinese) |
中文摘要 | 兩種型態的高彈性係數短碳纖強化商用純鋁基複合材料,已由自製擠壓鑄造法獲得,製造Type I複合材料的短碳纖維預成型,其纖維是以束狀分散排列,而製造Type II複合材料的短碳織維預成型,其纖維是以個別纖維均勻分散。含17 vol%纖維Type I複合材料的彎曲強度超過200MPa,含11 vol%纖維Type 11複合材料的彎曲強度可達166MPa。由SEM破斷面觀察,兩種不同型態的複合材料具有不同的破斷面。自TEM觀察在碳-鋁界面上有因熱應力引起的差排,而且反應物Al4C3在界面先成核,然後再長入基材內。將兩種不同C/Al複合材料與6061Al對磨後,結果顯示,磨耗30分鐘後6061 A磨耗量約為C/AI之3到7倍。 |
英文摘要 | Two types of high modulus short carbon fiber-reinforced commercially pure aluminum matrix composites have been fabricated in-house by a selfconstructed squeeze caster. The type I composites are fabricated from short fiber preforms in which fibers are dispersed in bundles. The type II composites are fabricated from preforms in which individual fibers are uniformly dispersed. A three-point bending strength higher than 200 MPa is obtained from the type I composites with 17 vol % fibers. The type II composites, with lower fiber volume fractions than those of the type l due to their different preforms, exhibit bending strengths up to l66 MPa. SEM fractography shows that the two types of composites fracture in distinctive manners. TEM features thermal stress-induced dislocations at carbon-aluminum interface as well as submicron-sized aluminum carbides, the reaction products, which nucleate from the interface and grow into matrix interior. Wear resistances of the composites were assessed by a disk-on-disk method using a 6061 Alalloy as counter-abrasion material. The results show that the wear loss of 6061 Al is 3 to 7 times greater than that of C/Al composites for a test period of 30 minutes. |
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