利用竹碳製作碳化矽/金屬複合材料

Fabrication of SiC / metal composite from bamboo bio-carbon

林士育(Shih-Yu Lin)

指導教授 ： 林永仁

大同大學/工程學院/材料工程學系所/碩士(2006年)

摘要

本研究的主旨是利用孟宗竹製備多孔碳化矽，再滲透2024 鋁合
金和金屬銅，形成陶瓷/金屬複合材料。首先將竹材在Ar 氣氛中經過
碳化處理後，使竹材轉化為竹碳，隨後再添加適當的矽源，形成具有
竹材結構的多孔性碳化矽陶瓷材料。在高溫及保護氣氛下，使熔融的
金屬熔湯藉由毛細管作用，滲透入多孔碳化矽中，以形成一陶瓷/金
屬複合材料。
在滲鋁的試片中，由XRD的結果發現，滲透溫度達900℃時才有
明顯鋁合金的滲透，且在滲透溫度為1050℃時材料內部有Al4C3相生
成，因此適當滲透溫度應為900℃。由阿基米德法測量試片密度，結
果顯示在滲透過程中，滲透量隨著滲透時間的增加而增加。在持溫時
間為8 小時，其Bulk density可達2.0 g/cm3，而Open porosity為13%。
另外，其微硬度平均值可達87.3 kg / mm2。
試片滲透金屬銅時，在1100℃有相當量的金屬銅滲透，且隨著
溫度的提升而增加。當滲透溫度為1300℃時其Bulk density可達4.9
g/cm3，而Open porosity僅剩約2%。 另外，其微硬度平均值可達114.5
kg / mm2。且試片在經1300℃滲透金屬銅後，其抗壓強度有明顯的增
加。

關鍵字

金屬 ； 碳化矽 ； 竹碳

並列摘要

The purpose of this research is to fabricate porous silicon carbide
from bamboo , and then to infiltrate 2024 aluminum alloy and copper to
form ceramic / metal composites . The bamboo was first transformed into
porous charcoal by carbonization in argon atmosphere . Proper proportion
of Si was then reacted with porous charcoal to form porous SiC ceramic .
Finally , under high temperature and inert atmosphere, melting metal
( Al-alloy and Cu ) were infiltrated into porous SiC by capillary force .
In the case of infiltrating Al alloy for 4 hr , Al alloy was found inside
the sample only when infiltrating temperatures were ≧900℃ . However ,
Al4C3 was formed if temperatures was 1050℃ . So 900℃ appeared to be
a suitable temperature to infiltrate Al alloy . The amount of infiltrated
Al-alloy increased as infiltration time increased . After infiltration at
900℃ for 8 hr , the bulk density of the sample reached 2.0 g/cm3 , and the
open porosity was 13% . The average of micro-hardness reached 87.3
kg / mm2 .
In the case of infiltrating Cu for 4hr , significant amount of Cu was
infiltrated in the sample at 1100℃ . The amount of infiltrated Cu
increased as infiltration time increased . After infiltration at 1300℃ for 4
hr , the bulk density of the sample reached 4.9 g/cm3 , and the open
porosity was 2% . The average of micro-hardness reached 114.5
kg / mm2 . After infiltration at 1300℃ for 4 hr , the compression strength
of the sample greatly increase due to the load bearing of Cu .

並列關鍵字

bamboo ； metal ； SiC

參考文獻

Arellano-Lopez, A. R.; Singh, M.” Precursor selection for property

optimization in biomorphic SiC ceramics.” Ceramic Engineering and

2. Vogli, Evelina; Zollfrank, Cordt; Sieber, Heino; Greil, Peter; Mukerji,

Joydeb.” Manufacturing of biomorphic SiC-ceramics by gas phase

and Synthesis of Ceramics, Glasses and Composites V), pp.33-42,