• 沒有找到結果。

奈米顆粒對複合材料機械行為的影響

N/A
N/A
Protected

Academic year: 2021

Share "奈米顆粒對複合材料機械行為的影響"

Copied!
4
0
0

加載中.... (立即查看全文)

全文

(1)

國 立 交 通 大 學

工學院精密與自動化工程學程

碩 士 論 文

奈米顆粒對複合材料機械行為的影響

Effect of Nanoparticles on Mechanical Performance

of Composites

研 究 生 : 黃 寶 鴻

指導教授 : 蔡 佳 霖 教授

中華民國 九十七 年 六 月

(2)

奈米顆粒對複合材料機械行為的影響

Effect of Nanoparticles on Mechanical Performance

of Composites

研 究 生:黃寶鴻 Student:Pao-Hung Huang 指導教授:蔡佳霖 Advisor:Jia-Lin Tsai

國 立 交 通 大 學

工學院精密與自動化工程學程

碩 士 論 文

A Thesis

Submitted to Degree Program of Automation and Precision Engineering College of Engineering

National Chiao Tung University In Partial Fulfillment of the Requirements

For the Degree of Master of Science In Automation and Precision Engineering

June 2008

Hsinchu, Taiwan, Republic of China

中 華 民 國 九 十 七 年 六 月

(3)

奈米顆粒對複合材料機械行為的影響

學生:黃寶鴻 指導教授:蔡佳霖

國立交通大學工學院精密與自動化工程碩士學程

摘 要

本研究主要探討奈米級的氧化鋁、二氧化矽和橡膠顆粒對於環氧 樹脂複合材料機械性質的影響,機械性質測試探討包括拉伸、彎曲及 破壞韌性實驗。 結果顯示加入不同尺寸的氧化鋁顆粒,在拉伸、彎曲試驗的模數 和強度值差異並不大,但破壞韌性實驗的韌性值則提升約 20%。 而添加橡膠顆粒對於環氧樹脂基材之破壞韌性的提升有顯著效 果,同時二氧化矽顆粒可以補償因橡膠所造成的剛性下降現象。 利用穿透式電子顯微鏡(TEM)進行奈米顆粒在複合材料的分散 性探討,結果顯示奈米級的氧化鋁顆粒,在複合材料中有明顯的團聚 現像,而奈米級的二氧化矽顆粒與橡膠則有良好的分散性。 場發射電子顯微鏡(FESEM)觀察複合材料表面破壞後的微觀現 象變化,與破壞韌性增益表現比較,可推論破壞韌性的提高,是由奈 米顆粒顆粒導致裂紋的初始生長與延伸受到阻礙,以及顆粒的脫落和 空孔化後,在空孔的周圍應力集中使得基材塑性變形,達到消散能量 的作用提升破壞韌性值。 3

(4)

4

Effect of Nanoparticles on Mechanical Performance

of Composites

Student:Pao-Hung Huang Advisor:Dr. Jia-Lin Tsai Submitted to Degree Program of Automation and Precision Engineering

College of Engineering National Chiao Tung University

Abstract

This research aims to investigate nanoparticles effect on mechanical behaviors of epoxy matrix. Mechanical tests including tensile, flexure and fracture toughness experiments were conducted on the sample with alumina, silica and rubber nanoparticles.

Based on the experimental observations, it was found that the tensile, flexural and fracture behaviors of the particulate composites were not affected by the particle sizes.

The fracture toughness of epoxy resin can be improved significantly by the inclusion of rubber particles. In addition, it was found the reduction of the stiffness caused by the rubber particles can be compensated by the silica nanoparticles

SEM observations on the fracture surface of rubber particle reinforced composites indicated that the increment of fracture toughness in the composites could be due to the formation of plastic deformation as well as the particle debonding and cavitations which can dissipate fracture energy dramatically.

參考文獻

相關文件

volume suppressed mass: (TeV) 2 /M P ∼ 10 −4 eV → mm range can be experimentally tested for any number of extra dimensions - Light U(1) gauge bosons: no derivative couplings. =>

For pedagogical purposes, let us start consideration from a simple one-dimensional (1D) system, where electrons are confined to a chain parallel to the x axis. As it is well known

The observed small neutrino masses strongly suggest the presence of super heavy Majorana neutrinos N. Out-of-thermal equilibrium processes may be easily realized around the

incapable to extract any quantities from QCD, nor to tackle the most interesting physics, namely, the spontaneously chiral symmetry breaking and the color confinement.. 

(1) Determine a hypersurface on which matching condition is given.. (2) Determine a

• Formation of massive primordial stars as origin of objects in the early universe. • Supernova explosions might be visible to the most

The difference resulted from the co- existence of two kinds of words in Buddhist scriptures a foreign words in which di- syllabic words are dominant, and most of them are the

(Another example of close harmony is the four-bar unaccompanied vocal introduction to “Paperback Writer”, a somewhat later Beatles song.) Overall, Lennon’s and McCartney’s