等离子体活化烧结过程的机理与应用VIP免费

等离子体活化烧结过程的机理与应用摘要等离子体活化烧结是一种烧结时间短、烧结温度低的固结方法，它融等离子体活化、热压和电阻加热为一体。它通过等离子体活化颗粒表面和快速升温来提高粉末的烧结性，从而实现快速烧结。本论文对目前主要烧结方法和等离子体活化烧结法的新应用进行了综述，分析了等离子体活化烧结法的优点和研究方向，确定了机理研究的路径。研究了等离子体活化烧结设备和工艺路线。活化了WC-Co,A1203,WC,Cu粉，对比了活化前后材料微观结构的异同，分析了原因，提出了等离子体活化模型，主要包括三个模型，同普通电阻加热烧结相比，等离子体活化具有特殊的效果。采用等离子体活化烧结法烧结了A1203,Zr0:纳米粉和WC-Co以及Cu粉，该方法在工艺参数和产品性能方面均优于传统烧结、微波烧结和微波等离子体烧结法。在机理探讨上，主要从热力学和动力学入手，分析了等离子体活化烧结的本质。关键词:等离子体活化烧结，纳米级A1203，纳米级ZrOz}Cu}WC-CoMechanismandApplicationofPlasmaActivatedSinteringProcessingStudent:IiboZhangSupervisor:Prof.JinhuiPTNGFacultyofMaterialsandMetallurgicalEngineeringKunmingUniversityofScienceandTechnologyAbstractPlasmaActivatedSintering(PAS)isashorttime,hightemperaturedensificationprocessbasedonthreemaincontributions:plasmageneration,pressureapplicationandresistancesintering.Itisanewrapiddensificationprocessthathasthepotentialtominimizethegraingrowthbyenhancingparticlesinterabilitythroughparticlesurfaceactivationandrapidheating.Inthispaper,majorsinteringprocessingandNev.%applicationofplasmaactivatedsinteringhavebeenreviewed.Theadvantagesandthedirectionofresearchofplasma‘activatedsinteringhavebeenanalyzed.Theresearchmethodofmechanismhasbeendetermined.Theequipmentandprocessingofplasmasinteringwereinvestigated.昆明理工大学硕士学位论文(缩写本)论文题目:等离子体活化烧结过程的机理与应用一..卜一，}rr名:业:姓专研究方向:指导教师:彭金辉(教授)学习期限:昆明理工大学硕士学位论文缩写本等离子体活化烧结过程的机理与应用2000年1绪论二“““”””..““”““”””””..””””””:.”””….””..”..””””..””..”….”..”..””:.””””””..“..””..“..….，.….””..”“..”””:.等离子体活化烧结法简介..”..“..”二”:.““..““””:.””.”””“.““二”….”””二“..................................4等离子体活化烧结法的应用二””””””““”:.”..”””””.”””“….””…-”..”””“.”….…”””””.”..…等离子体活烧结耀的初姗究.........................................................................................511，l内j姗.立勺.1门.11.4等离子体活化烧结法的优点和主要研究方向.....................................................................62'设备的研制和工艺路线二”..........................................................................................................................62.1等离子筛悦结设备的琳}..................................................:....................................................62.2烧结模的确定.”.“””..“….”:.””“”..““..”..”“..….””””“.”“”““..”二”........................................................72.3试验装置和工艺路线.............................................................................................................................72.3.1工艺路线….........................................................................................................................................7232-i验装置及其参数二””””””””””””“””..”:.”””..””.””二“...........................................................8...