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題名 | The Processing and the Mechanical Property of Aluminum Nitride and Aluminum Composite=氮化鋁和鋁複合材料的製程和機械性質 |
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作者 | 李丁福; | 書刊名 | 海軍軍官學校學報 |
卷期 | 3 1993.12[民82.12] |
頁次 | 頁47-60 |
分類號 | 440.34 |
關鍵詞 | 氮化鋁; 製程; 鋁複合材料; 機械性質; |
語文 | 英文(English) |
中文摘要 | 將熔解之鋁滲入具有氣孔的燒結過氮化鋁中,可製成一兩相彼此交聯的複合材料 。在預製件中有33-47體積百分比的孔隙。氮化鋁的粒徑大小在3-13個微米間,因而能在相 同的孔隙時,建立各種不同的孔隙結構。破裂韌性和破裂功與所含鋁體積百分比成正比,與 氮化鋁的連續性成反比。破裂韌性為5.01-7.54Mpa. m□。破裂功為73-166J/m�插C氮化鋁和 鋁的複合材料能顯示上升的裂口成長阻力(R)曲線,此R曲線漸升至1.4毫米時達到飽和。 實驗證明導致此複合物韌性增加的原因是裂面間的金屬橋,而非裂口尖端的微裂痕或塑性變 形。 |
英文摘要 | A double-phased and interconnected composite was produced by infiltrating molten Al into porous and sintered AIN. The prosity of the resulted Al content varied from 33 to 47 percent in volume. With the sizes of AIN particle varying from 3 to 13 microns, different pore structures can be produced for the same porosity. The fracture toughness and work of fracture measured on chevron notch specimens were found to be directly proportional with the volume percent of Al, and inversely with the connectxivity of AIN. The fracture toughness of all composites ranged form 5.01 to 7.53 MPa. m□, and the work of fracture from 73 and 166 J/m�� . A crack growth resistance curve (R-curve) exhibiting rising behavior was also obtained from AIN/Al composite, which reached its saturation point with a crack extension of 1.4 mm. An interrupted chevron notch specimen revealed the increasing toughness of the composite came from the metal phase which bridged the cracks, not the microcracking or the plastic deformation found around the crack tip. |
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