由于其低熱中子吸收截面,優(yōu)異的耐腐蝕性和結(jié)構(gòu)完整性,鋯合金在PWR的燃料包覆材料中占主導(dǎo)地位。然而,隨著反應(yīng)堆技術(shù)的發(fā)展和對(duì)運(yùn)行安全的要求越來(lái)越高,對(duì)包殼材料的高溫穩(wěn)定性提出了更嚴(yán)格的要求。鋯合金覆層在正常操作條件下工作良好,但通常在超過(guò)900℃的溫度下破裂,然而,鐵-鉻-鋁鐵素體不銹鋼在高溫下具有更好的耐中子輻照性和更好的抗氧化性、耐腐蝕性和機(jī)械性能,而鋯合金有望成為下一代耐事故燃料（ATF）包殼材料。在“簇加膠原子”結(jié)構(gòu)模型的指導(dǎo)下,本文包括鐵-鉻-鋁-M合金的成分特征和添加少量合金元素M（M=鉬鈮鉻/鉭）的規(guī)律性,以及根據(jù)簇模型設(shè)計(jì)鐵-鉻-鋁-M合金的結(jié)構(gòu)表征并同時(shí)做了系統(tǒng)性能檢測(cè)。研究了鐵-鉻-鋁-M合金元素對(duì)微觀(guān)組織穩(wěn)定性和微觀(guān)組織隨溫度變化的影響,為新型鐵素體不銹鋼提供了抗干擾燃料包覆材料的候選材料。實(shí)驗(yàn)結(jié)果表明,細(xì)小的第二相析出物（主要是拉弗斯相）均勻分布在舊化合金的鐵素體基體中。在高于1000℃的高溫下再處理這些合金后,第二相沉淀物開(kāi)始溶解到基質(zhì)中。拉弗斯相沉淀物在經(jīng)過(guò)1200℃每小時(shí)的再處理后,在含有少量合金元素鉬/鈮/鉭的合金中幾乎完全溶解到鐵素體基質(zhì)中,并將合金進(jìn)... 

【文章來(lái)源】：大連理工大學(xué)遼寧省 211工程院校 985工程院校 教育部直屬院校

【文章頁(yè)數(shù)】：75 頁(yè)

【學(xué)位級(jí)別】：碩士

【文章目錄】：
摘要
Abstract
1 Introduction
    1.1 Application Background of Fe-Cr-Al Alloy
        1.1.1 Nuclear Power Development History
        1.1.2 The Concept of Accident Tolerant Fuel System
        1.1.3 Accident-Tolerant Fuel-Resistant Cladding Candidate
    1.2 Overview of Nuclear Grade Fe Cr Al Alloy
        1.2.1 Research Status at Home and Abroad
        1.2.2 Typical Microstructure and Mechanical Properties of Nuclear GradeFe Cr Al Alloy
        1.2.3 Element Types and Effects in Nuclear Grade Fe Cr Al Alloy
    1.3 Common Alloy Design Method
        1.3.1 Element Equivalent Method
        1.3.2 Hume-Rothery Rule
        1.3.3 Computer Simulation
        1.3.4 Cluster Plus Glue Atom Model
    1.4 Significance of Research and Objectives
        1.4.1 Research Significance
        1.4.2 Research Objectives
2 Alloy Composition Design Based on Cluster Model
    2.1 Solid Solution Alloy Cluster Plus Glue Atom Structure Model
    2.2 Cluster Model and Composition Design of Fe-Cr-Al Ternary Alloy
3 Experimental Methods
    3.1 Sample Preparation
    3.2 Heat Treatment and Alloy Processing
    3.3 XRD X-Ray Diffraction Analysis
    3.4 OM Optical Microstructure Analysis
    3.5 SEM Scanning Electron Microscopy
    3.6 TEM Transmission Electron Microscopy
    3.7 EPMA Electron Probe Micro Analysis
    3.8 Micro Hardness Testing
4 Results
    4.1 X-Ray Diffraction
    4.2 Microstructure Characterization
    4.3 Electron Probe Micro Analysis
    4.4 Transmission Electron Microscopy
    4.5 Micro Hardness Study
5 Discussions
    5.1 Grain Growth
    5.2 Precipitation Behavior
Conclusions
References
Research Publications in Master Study
Acknowledgement


【參考文獻(xiàn)】：
期刊論文
[1]基于固溶體短程序結(jié)構(gòu)的團(tuán)簇式合金成分設(shè)計(jì)方法[J]. 姜貝貝,王清,董闖.  物理學(xué)報(bào). 2017(02)



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