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| Si_3N_(4(p))/SiC_((w))强韧化MoSi_2基复合材料的显微组织与力学性能 | |
| 引用本文： | 周宏明,易丹青,李丹,肖来荣,柳公器.Si_3N_(4(p))/SiC_((w))强韧化MoSi_2基复合材料的显微组织与力学性能[J].粉末冶金技术,2010,28(3). |
| 作者姓名： | 周宏明 易丹青 李丹 肖来荣 柳公器 |
| 作者单位： | 1. 中南大学材料科学与工程学院,长沙,410083;粉末冶金国家重点实验室,长沙,410083 2. 中南大学材料科学与工程学院,长沙,410083 3. 航天材料及工艺研究所,北京,100076 |
| 基金项目： | 中国博士后基金特别资助项目，教育部博士点新教师基金项目，中国博士后基金 |
| 摘 要： | 采用热压工艺制备了不同Si3N4(p)和SiC(w)体积含量的MoSi2基复合材料,通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)、维氏硬度计、电子万能材料试验机等研究了复合材料的显微组织、硬度、断裂韧度和抗弯强度,并对其强韧化机理进行了初步探讨。结果表明,复合材料结构致密,强化相与MoSi2之间没有新相生成,力学性能较纯MoSi2得到大幅度提高,其中MoSi2-20%Si3N4(p)-20%SiC(w)复合材料具有最好的抗弯强度和断裂韧度,分别为427MPa和10.4MPa.m1/2。复合材料的强化机制为细晶强化和弥散强化,韧化机制为细晶韧化和裂纹偏转与分支韧化。 |
| 关 键 词： | 复合材料 Si3N4颗粒 SiC晶须 强韧化机制 |
Microstructure and mechanical properties of MoSi2-based composite strengthened and toughened by Si3N4(p) and SiC(w) |
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| Zhou Hongmingg,Yi Danqing,Li Dan,Xiao Lairong,Liu Gongqi.Microstructure and mechanical properties of MoSi2-based composite strengthened and toughened by Si3N4(p) and SiC(w)[J].Powder Metallurgy Technology,2010,28(3). | |
| Authors: | Zhou Hongmingg Yi Danqing Li Dan Xiao Lairong Liu Gongqi |
| Affiliation: | Zhou Hongming1),3),Yi Danqing1),Li Dan2),Xiao Lairong1),Liu Gongqi1)1)(School of Materials Science and Engineering,Central South University,Changsha 410083,China)2)(Aerospace Research Insititufe of Material & Processing Technology,Beijing 100076,China)3)(State Key Laboratory for Powder Metallurgy,China) |
| Abstract: | MoSi2 composites with different Si3N4(p)and SiC(w)volume contents were prepared by hot pressing process.The structure,morphology,hardness,fracture toughness,bending strength,strengthening and toughening mechanism of the MoSi2-Si3N4(p)/SiC(w)composites were investigated by means of X-ray diffraction(XRD),Scanning electron microscope(SEM),Vichers hardness tester,and electronic universal material tester.It is shown that mechanical properties of the prepared composites are much higher than that of MoSi2,there i... |
| Keywords: | MoSi2 |
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