分别以64.7%的硼粉+35.3%的炭黑或55%的硼粉+45%的炭黑为试样组成,分别在真空和非真空条件下,采用自蔓延燃烧法于1400 ℃保温10～20 min进行了B4C-部分石墨化炭黑复合粉体的合成研究.采用XRD、SEM 及电子探针等方法对合成粉体的物相及形貌进行了分析;以差热法(TG-DSC)研究了合成粉体的氧化特性.结果表明:炭黑和硼粉加入量(w)分别为45%和55%时,经自蔓延燃烧反应后可以得到粒度均匀的碳化硼(B4C)粉体,且碳黑已部分石墨化.与工业B4C相比,复合粉体中的B4C具有更好的保护碳不被氧化的特性.
参考文献
| [1] | Pampuch R;Biafoskorski J;Walasek E .Mechanism of reactions in the Sif+Cf system and the self-propagating high-temperature synthesis of silicon carbide[J].Ceramics International,1987,13(01):63-68. |
| [2] | Pampuch R;Stobierski L;Lis J et al.Solid combustion sythesis of β-SiC powders[J].Materials Research Bulletin,1987,22(09):1225-1231. |
| [3] | Zuhair A Munir;Umberto A Tamburtini .Self-propagating exothermic reaction:The synthesis of high-temperature materials by combustion[J].Materials Science Reports,1989,3(06):279-365. |
| [4] | Zuhair A Munir;Umberto A Tamburtini .Self-propagating exothermic reaction:The synthesis of high-temperature materials by combustion[J].Materials Science Reports,1989,3(7-8):277-365. |
| [5] | Ludosfaw Stobierski;Elzbieta Ermer;Roman Pampuch et al.Supersaturated solid solutions of boron in SiC by SHS[J].Ceramics International,1993,19(04):231-234. |
| [6] | Tamura S;Ochiai T;Nakamura H.Nano-tech refractoris-1:The development of the nano structural matrix[A].,2003:517-520. |
| [7] | Takanaga S;Ochiai T;Kanai T.Nano-tech refractories-2:The application of the nano structural matrix to MgO-C brick[A].,2003:521-524. |
| [8] | Matsui T;Goto K;Yamada Y.Characteristics and application of nano-tech magnesia carbon bricks[A].,2005:176-179. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%