EffectofSi3N4AdditionontheMechanicalProperties,Microstructures,andWearResistanceofTi-6Al-4VAlloy

被引：0

作者：

Montasser MDewidar ^{[1
]}

HyoJin KIM ^{[2
]}

JaeKyoo LIM ^{[3
]}

机构：

[1] Department of Mechanical Design,Chonbuk National University,Dokjin --,Jeonju,South Korea Department of Mechanical Design and Materials,High Institute of Energy,South Valley University,Aswan,Egypt

[2] Department of Mechanical Design and Materials,High Institute of Energy,South Valley University,Aswan,Egypt

[3] Automobile High-Technology Research Institute,Faculty of Mechanical and Aerospace System Engineering,Chonbuk National University,Dokjin --,Jeonju,South Korea

来源：

JournalofMaterialsScience&Technology | 2007年 / 02期

关键词：

Ti-6Al-4V; Silicon nitride; Sintering reaction; Mechanical properties;

D O I：

暂无

中图分类号：

TG115 [金属的分析试验（金属材料试验）];

学科分类号：

080502 ;

摘要：

<正>In order to improve the wear resistance of Ti-6Al-4V, different amounts of Si3N4 powder were added into the alloy powder and sintered at 1250℃. Porous titanium alloy with higher wear resistance was successfully fabricated. At sintering temperature, reaction took place and a new hard phase of Ti5Si3 formed. The mechanical properties of the fabricated alloys with different amounts of Si3N4 addition were investigated. The hardness of Ti-6Al-4V, which is the index of wear resistance, was increased by the addition of Si3N4. Amounts of Si3N4 addition have very significant influences on hardness and compressive strength. In present study, titanium alloy with 5 wt pct Si3N4 addition has 62% microhardness and 45% overall bulk hardness increase, respectively. In contrast, it has a 16.4% strength reduction. Wear resistance was evaluated by the weight loss during wear test. A new phase of Ti5Si3 was detected by electron probe microanalyzer (EPMA) and X-ray diffraction (XRD) method. The original Si3N4 decomposed during sintering and transformed into titanium silicide. Porous structure was achieved due to the sintering reaction.

引用

页码：257 / 261

页数：5