首页期刊信息编委及顾问期刊发行联系方式使用帮助常见问题ENGLISH
位置:首页 >> 正文
凝胶注模固化应力的研究
作者:金晓1 余娟丽1 杨金龙1 刘炜2 
单位:1. 清华大学材料科学与工程系 新型陶瓷与精细工艺国家重点实验室 北京 100084 2. 中北大学材料科学与工程学院 太原 030051 
关键词:凝胶注模 内应力 应力感应器 浆料固化 
分类号:TQ 17416
出版年,卷(期):页码:2012,40(9):1271-1277
DOI:
摘要:

摘  要:凝胶注模成型工艺作为一种原位凝固成型技术,可有效提高材料的可靠性,降低复杂形状陶瓷部件的制造成本;但在凝胶注模成型过程中,由于坯体内部易产生应力,在后续的干燥和排胶过程中极容易造成坯体开裂。为定量分析固化应力对坯体开裂的影响,利用自制的应力感应器对浆料在成型过程中产生的内应力大小进行了检测,研究了催化剂、引发剂、有机物浓度、有机单体与交联剂的比例、固相体积分数等对浆料固化内应力的产生以及排胶后坯体开裂的影响。结果表明:浆料在固化过程中会产生内应力,浆料中引发剂和单体含量的增加使得内应力增大;单体与交联剂质量比减小造成浆料的最高温度点升高,浆料固化过程中产生的应力增加,使得坯体排胶开裂现象更为严重。

women want men how to cheat how do i know if my wife cheated
how do i know if my wife has cheated men having affairs read
read read here link
My wife cheated on me why wives cheat on husbands reasons married men cheat
why married men cheat on their wives click here women cheat on men
sumatriptan side effects sumatriptan side effects sumatriptan side effects
bystolic copay card click bystolic coupon voucher

Abstract: Gelcasting process is a consolidation in-situ forming technique, which can effectively increase the material reliability and reduce the manufacturing cost of complex-shaped ceramic parts. However, the internal stress easily occurs in the green body during gelcasting, affecting the performance of the green body during drying and de-bindering processes due to the presence of the cracks in green body. In order to quantitatively analyze the effect of consolidation stress on the cracks in green body, the internal stress generated in the process of slurry solidification was measured using a self-made stress sensor. The effects of process parameters (i.e., catalyst, initiator, concentration of organic mater, ratio of organic monomer to crosslinker and solid volume fraction) during gelcasting on the internal stress of slurry solidification and the crack of green body after de-bindering were systematically investigated. The results indicate that inner stress is generated during slurry solidification. The inner stress increases with the increase of initiator and monomer content in slurry, and the temperature in slurry increases with the decrease of the mass ratio of monomer to crosslinker, causing the increase of inner stress and the occurrence of serious crack in green body during de-bindering.

online click open
open cheat women go
why do wife cheat on husband why men cheat how to cheat wife
基金项目:
国家自然科学基金(51172120);国家创新方法工作专项(2011IM030800)及北京市科技计划(Z101103055010003)资助项目。
作者简介:
第一作者:金 晓(1986—),男,博士研究生。 通信作者:杨金龙(1966—),男,博士,教授。
married cheaters how many women cheat click
why do wife cheat on husband why wifes cheat how to cheat wife
参考文献:

参考文献:
[1]  YOUNG A C, OMATETE O O, JANNEY M A, et al. Gelcasting of alumina [J]. J Am Ceram Soc, 1991, 74(3): 612–618.
[2]  OMATETE O O, JANNEY M A, STREKLOW R A. Gelcasting—a new ceramic forming process [J]. Am Ceram Soc Bull, 1991, 70(10): 1641–1649.
[3]  GILISSEN R, ERAUW J P, SMOLDERS A, et al. Gelcasting, a near net shape technique [J]. Mater Des, 2000, 21(4): 251–257.
[4]  NUNN S D, KIRBY G H. Green machining of gelcastceramic materials [J]. Ceram Eng Sci Proc, 1996, 17(3): 209–213.
[5]  郭瑞, 汪长安, 杨安坤. 3–3型与1–3型多孔锆钛酸铅陶瓷的结构和性能[J]. 硅酸盐学报, 2011, 39(11): 1780–1786.
GUO Rui, WANG Changan, YANG Ankun. J Chin Ceram Soc, 2011, 39(11): 1780–1786.
[6]  余娟丽, 杨金龙, 李和欣, 等. 短链两亲分子活性剂制备氮化硅泡沫陶瓷[J]. 硅酸盐学报, 2012, 40(3): 329–334.
YU Juanli, YANG Jinlong, LI Hexin, et al. J Chin Ceram Soc, 2012, 40(3): 329–334.
[7]  金晓, 蔡锴, 刘炜, 等. 单体含量对凝胶注模工艺固化时内应力及坯体性能的影响[J]. 硅酸盐学报, 2011, 39(5): 794–798.
JIN Xiao, CAI Kai, LIU Wei, et al. J Chin Ceram Soc, 2011, 39(5): 794–798.
[8]  SEPULVEDA P. Gelcasting foams for porous ceramics [J]. Am Ceram Soc Bull, 1997, 76(10): 61–65.
[9]  LIU Yafei, LIU Xingqin, MENG Guangyao, et al. Porous mullite ceramics from national clay produced by gelcasting [J]. Ceram Int, 2001, 27(1): 1–7.
[10]  SUN Jing, GAO Lian, GUO Jingkun, et al. Gelcasting of nano-size Y-TZP [J]. Acta Mater, 1996, 9(6): 489–492.
[11]  BASKIN D M, ZIMMERAN M H, FABER K T. Forming single-phase laminates via the gelcasting technique [J]. J Am Ceram Soc, 1997, 80(111): 2929–2932.
[12]  WOESZ A, RUMPLER M, STAMPFL J, et al. Towards bone replacement materials from calcium phosphates via rapid prototyping and ceramic gelcasting [J]. Mater Sci Eng C, 2005, 25(2): 181–186.
[13]  JANNEY M A, OMATETE O O, WALLS C A, et al. Development of low-toxicity gelcasting systems [J]. J Am Ceram Soc, 1998, 81(3): 581–591.
[14]  CHEN Yali, XIE Zhipeng, YANG Jinlong, et al. Alumina casting based on gelation of gelatine [J]. J Am Ceram Soc, 1999, 19(2): 271–275.
[15]  MORISSETTE S L, LEWIS J A. Chemorheology of aqueous-based alumina–poly(vinyl alcohol) gelcasting suspensions [J]. J Am Ceram Soc, 1998, 82(3): 521–528.
[16]  谢志鹏, 杨金龙, 陈亚丽, 等. 琼脂糖凝胶大分子在陶瓷原位凝固成型中的应用[J]. 硅酸盐学报, 1999, 27(1): 16–21.
XIE Zhipeng, YANG Jinlong, CHEN Yali, et al. J Chin Ceram Soc, 1999, 27(1): 16–21.
[17]  杨金龙, 马利国, 马天, 等. 陶瓷胶态注射成型液固转变过程中内应力产生机制初探[J]. 真空电子技术, 2003(4): 9–12.
YANG Jinlong, MA Liguo, MA Tian, et al. Vac Electron (in Chinese), 2003(4): 9–12.
[18]  ABBAS E N, HARN Y P, DRASKKOVICH B S, et al. A physical model for the drying of gelcast ceramics [J]. J Am Ceram Soc, 1999, 82: 513–520.
[19]  HOLMES D M, KUMAR R V, CLEGG W J. Cracking during lateral drying of alumina suspensions [J]. J Am Ceram Soc, 2006, 89(6): 1908–1913.
[20]  BARATI A, KOKABI M, FAMILI M. Drying of gelcast ceramic parts via the liquid desiccant method [J]. J Eur Ceram Soc, 2003, 23(13): 2265–2272.
[21]  YANG Jinlong, XI Xiaoqing, HUANG Yong. Shrinkages during from liquid to solid in colloidal forming [J]. Key Eng Mater, 2007, 336–338: 2378–2381.
[22]  潘才元. 膨胀聚合反应及应用[M]. 成都: 四川教育出版社, 1988: 5–7.
[23]  MA Liguo, HUANG Yong, YANG Jinlong, et al. Control of the inner stresses in ceramic green bodies formed by gelcasting [J]. Ceram Int, 2006, 12(32): 93–98.
[24]  马利国, 黄勇, 杨金龙, 等. 凝胶注模成型固化过程及影响因素–陶瓷浆料凝胶点测定及其影响因素的研究[J]. 成都大学学报: 自然科学版, 2002, 21(2): 5–10.
MA Liguo, HUANG Yong, YANG Jinlong, et al. J Chengdu Univ: Nat Sci Ed (in Chinese), 2002, 21(2): 5–10.
[25]  范钦珊, 任文敏, 陈艳秋. 材料力学[M]. 北京: 清华大学出版社, 2004: 99–111.
[26]  YU Juanli, WANG Hongjie, ZHANG Jian, et al. Gelcasting preparation of porous silicon nitride ceramics by adjusting the content of monomers [J]. J Sol–Gel Sci Technol, 2010, 53(3): 515–523.
[27]  YU Juanli, WANG Hongjie, ZENG Hong, et al. Effect of monomer content on physical properties of silicon nitride ceramic green body prepared by gel casting [J]. Ceram Int, 2009, 35(3): 1039–1044.

why do wife cheat on husband why men cheat how to cheat wife
doxycycline doxycycline doxycycline
cialis coupon cialis coupon cialis coupon
服务与反馈:
文章下载】【加入收藏
中国硅酸盐学会《硅酸盐学报》编辑室
京ICP备10016537号-2
京公网安备 11010802024188号
地址:北京市海淀区三里河路11号    邮政编码:100831
电话:010-57811253  57811254    
E-mail:jccs@ceramsoc.com