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Al2O3/Cr3C2/(W，Ti)C复合陶瓷的增韧机制
发表时间：2010-02-28 浏览量：1683 下载量：801
| 全部作者： | 高莹，张勤河，胡宝林，张波 |
| 作者单位： | 山东大学机械工程学院 |
| 摘 要： | 通过将Cr3C2和(W，Ti)C中间合金引入Al2O3基陶瓷材料中，制备了不同组份的Al2O3/Cr3C2/(W，Ti)C复合陶瓷材料，研究了该复合陶瓷材料的硬度、断裂韧性和抗弯强度。结果表明：Al2O3/Cr3C2/(W，Ti)C复合陶瓷材料的抗弯强度和断裂韧性明显优于纯Al2O3陶瓷；并对Al2O3/Cr3C2/(W，Ti)C复合陶瓷进行了应力分析，得出在Al2O3/Cr3C2/(W，Ti)C复合陶瓷中，热膨胀系数的失配是产生裂纹的主要原因。最后，利用3种增韧机制理论对裂纹的产生和扩展进行了分析。 |
| 关 键 词： | 机械设计；无机陶瓷材料；复合陶瓷；增韧机制；Al2O3/Cr3C2/(W，Ti)C |
| Title： | Toughening mechanism of Al2O3/Cr3C2/(W, Ti)C composite ceramics |
| Author： | GAO Ying, ZHANG Qinhe, HU Baolin, ZHANG Bo |
| Organization： | School of Mechanical Engineering, Shandong University |
| Abstract： | The hardness, fracture toughness and bending strength of composite ceramics, which are derived by mixing Cr3C2 and (W, Ti)C into Al2O3 matrix and obtaining Al2O3/Cr3C2/(W, Ti)C composite ceramics having different components, are tested and analyzed. The results show that composite ceramics are superior to pure Al2O3 ceramics in bending strengthen and fracture toughness. The main reason for the crack of Al2O3/Cr3C2/(W, Ti)C composite ceramics is found to be the mismatch of thermal expansion factor by performing stress calculation. Three toughening mechanisms are used to analyze the crack propagation. |
| Key words： | mechanical design; inorganic ceramics material; composite ceramics; toughening mechanism; Al2O3/Cr3C2/(W, Ti)C |
| 发表期数： | 2010年2月第4期 |
| 引用格式： | 高莹，张勤河，胡宝林，等. Al2O3/Cr3C2/(W，Ti)C复合陶瓷的增韧机制[J]. 中国科技论文在线精品论文，2010，3（4）：350-354. |
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