最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

+高級檢索
TiB2-Cu-Ni梯度功能材料的抗燒蝕行為
DOI:
作者:
作者單位:

作者簡介:

通訊作者:

中圖分類號:

TB33

基金項目:

教育部博士點基金(20020213037)及航天創(chuàng)新基金


Ablation Behaviour of Titanium Diboride-Copper-Nickle FGM
Author:
Affiliation:

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計
    • |
  • 參考文獻
    • |
  • 相似文獻
    • |
  • 引證文獻
    • |
  • 資源附件
    • |
  • 文章評論
    摘要:

    采用燃燒合成與同時致密化技術(shù)制備了TiB2-Cu-Ni5層金屬-陶瓷梯度功能材料。利用掃描電鏡(SEM)、電子探針(EPMA)等方法對梯度材料的成分及燒蝕前后的微觀組織形貌等進行了檢測，用等離子火炬電弧加熱器對材料進行加熱來考察梯度材料的抗熱震性能以及抗燒蝕性能。結(jié)果表明，梯度功能材料各層之間的界線已經(jīng)模糊，層與層之間的結(jié)合較好；梯度材料在瞬間加熱時和瞬間冷卻時均未出現(xiàn)崩裂，燒蝕后表面沒有裂紋產(chǎn)生，說明該梯度材料具有優(yōu)異的抗熱震性能；燒蝕20S后，梯度功能材料燒蝕后的質(zhì)量損失僅為0．5g，說明梯度功能材料具有良好的抗燒蝕性能。梯度材料的抗燒蝕機理為金屬粘接劑的揮發(fā)損失、熱化學(xué)燒蝕和機械沖刷。該梯度材料在固體火箭發(fā)動機的噴管、喉襯等部件上有廣闊的應(yīng)用前景。

    Abstract:

    TiB2-Cu-Ni five-layer metal-ceramic functionally graded material (FGM) was produced by self-propagating high- temperature synthesis (SHS) under the conditions of pseudo hot isostatic pressing (PHIP). The microstructure and composition of the FGM before and after test were examined by SEM and EPMA etc. The FGM was heated for 20 seconds by plasma torch arc heater to investigate thermal shock resistance and ablation behaviour. The results show that the stacked interface between layer and layer of FGM is obscure, which shows that the bonding between layer and layer is good. The FGM did not burst apart when the surface temperatures of FGM increased and went down drastically in a very short moment. Moreover, no apparent cracks were found on the ablation surface of FGM. These results show that the thermal shock resistance of FGM is excellent. The mass loss of FGM after ablation test is only 0.5 g, which shows that the resistance to ablation and erosion of FGM is good. The ablation mechanisms of the material are volatilization of metal binder, hot chemical ablation and mechanical erosion. This FGM can be used widely as nozzle and throat in the solid rocket motor.

    參考文獻
    相似文獻
    引證文獻
引用本文

徐強 張幸紅 韓杰才 赫曉東 VL．Kvalin. TiB2-Cu-Ni梯度功能材料的抗燒蝕行為[J].稀有金屬材料與工程,2004,33(10):1072~1075.[Xu Qiang, Zhang Xinghong, Han Jiecai, He Xiaodong, V. L. Kvanin. Ablation Behaviour of Titanium Diboride-Copper-Nickle FGM[J]. Rare Metal Materials and Engineering,2004,33(10):1072~1075.]
DOI：[doi]

復(fù)制
文章指標
  • 點擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:
  • 最后修改日期:2003-06-17
  • 錄用日期:
  • 在線發(fā)布日期:
  • 出版日期: