冯祖德
从事生物医学材料和材料微结构方面的研究
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- 姓名:冯祖德
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学术头衔:
博士生导师
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学科领域:
材料科学
- 研究兴趣:从事生物医学材料和材料微结构方面的研究
冯祖德,男,1951年3月生,厦门大学材料学院副院长,纳米科技中心副主任,厦门大学生物医学工程研究中心学科带头人。中国机械工程学会失效分析分会理事,中国机械工程学会理化检验分会理事,福建省电子显微学会副理事长,中国机械工程学会高级会员。1978年1月至1983年8月在石油工业部管材中心(现为石油天然气总公司管材研究所)工作,1990年3月至2007年8月在厦门大学化学系(现为化学化工学院)工作,2007年9月起在厦门大学材料学院工作,1992年9月至1996年3月期间应邀在美国纽约州立大学布法罗分校医学院从事博士后合作研究。长期从事生物医学材料和材料微结构方面的研究,先后研制和开发了牙釉质表面再生修复防龋涂剂、可储存可注射型根管填充糊剂、牙釉质表面有序结构仿生修复涂层制备的电化学技术、超声波骨质测定仪、纳米复合生物活性骨水泥、稀土生物材料和铝基复合材料表面防腐处理技术。已主持和合作承担国家和省部级科研项目22项。在国内外正式发表学术论文92篇(其中为SCI、EI和Medline收录44篇,被引用121次),参加国内外学术会议论文45篇(其中在国际和全国性学术会议上大会报告和大会特邀报告5篇),参与编写(副主编)专著《骨矿与临床》。一项科研成果获福建省科学技术进步三等奖,两项科研成果分别通过国家机电部和教育部鉴定(分别为国际先进和国内领先),获厦门大学南强一等集体奖(科研类,1999)。曾担任第一届海峡两岸材料腐蚀与防护研讨会大会秘书长(1998),第五届国际材料大会(IUMRS-ICAM’99)仿生材料分会主席(1999),第一届国际骨矿化会议(First International Conference on Bone and Mineral Research)科学委员会委员(2001)。
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6
【期刊论文】Synthesis and structure of cerium-substituted hydroxyapatite
冯祖德, ZUDE FENG∗, YINGMIN LIAO, MENG YE
JOURNAL OF MATERIALS SCIENCE: MATERIALS IN MEDICINE 16(2005)417-421,-0001,():
-1年11月30日
The aim of this study was to explore the effect of cerium ions on the formation and structure of hydroxyapatite (HAP). All particles, prepared by hydrothermal method, were synthesized at varied XCe =Ce/(Ca+Ce) (from 0 to 10%) with the atomic ratio (Ce + Ca)/P fixed at 1.67. Their morphology, composition and crystal structure were characterized by TEM, EPMA, XRD and FTIR. The results showed that in this composition range the apatite structure is maintained, Ce3+ ions could enter the crystal lattice of apatite and substitute Ca2+ ions. The doping of Ce3+ ions resulted in the decrease of the crystallite size with increase in XCe. The HAP particles without doping were short rods having a diameter from 10 to 20nm and a length from 30 to 50nm. They grew into long needles upon increasing XCe.
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【期刊论文】退火温度对Hi-Nicalon SiC纤维微观结构及力学性能的影响
冯祖德, 王艳艳, 张立同, 唐学原
硅酸盐学报,2005,33(3):263~267,-0001,():
-1年11月30日
Hi-Nicalon碳化硅纤维是一种作为高温下应用的陶瓷基复合材料的增强体。研究温度对Hi-Nicalon碳化硅纤维微观结构及力学性能的影响对于Hi-Nicalon碳化硅纤维的改进和应用具有重要意义。在氩气流的保护下,Hi-Nicalon碳化硅纤维分别在1400,1600 ℃和1800 ℃保温10h进行了退火处理。然后利用高分辨透射电子显微镜和X射线衍射分析方法对其经不同温度退火处理后纤维的微观结构进行表征,并用电子单纤维强力机测定其拉伸强度。研究结果表明:随着退火温度的升高,β-SiC晶粒不断长大;堆垛层错不断形成;游离碳堆垛层数和长度都随之增加,排列也趋于规整。拉伸强度也随着退火温度的升高而降低,经1800℃保温10h退火处理后的纤维的平均强度下降到了1.0GPa。
Hi-Nicalon碳化硅纤维, 微观结构, 温度, 高分辨透射电镜, 拉伸强度
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冯祖德, Z FENG, PhD, I ZIV, MD, DSc, J RHO, S HAN, PhD and Z FISHKIN
The British Journal of Radiology, 73(2000)498-503,-0001,():
-1年11月30日
To estimate the accuracy of quantitative computed tomography (QCT) as a method to measure bone mineral density (BMD) in the vicinity of a titanium prosthesis, we investigated the effects of (1) titanium prosthesis, (2) offset of the longitudinal axis of the bone to be examined from that of the gantry of the CT scanner, (3) size of the
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【期刊论文】Orientation and loading condition dependence of fracture toughness in cortical bone
冯祖德, Zude Feng a, *, Jae Rho b, Seung Han c, Israel Ziv c
Materials Science and Engineering C 11 2000, 41-46,-0001,():
-1年11月30日
The fracture toughness at crack initiation were determined for bovine cortical bone under tension mode Ⅰ., shear mode Ⅱ., and tear mode Ⅲ. A total of 140 compact tension specimens, compact shear specimens and triple pantleg TP.specimens were used to measure fracture toughness under tension, shear, and tear, respectively. Multiple-sample compliance method was utilized to measure the critical strain energy release rate Gc.at the arWs0.55 crack length, a, to specimen width, W, ratio.. The critical stress intensity factor Kc. was also calculates from the critical loading Pc. of the specimens at the arWs 0.55. The effect of the anisotropy of bone on its resistance to crack initiation under shear and tear loading was investigated as well. Fracture toughness of bone with precrack orientations parallel designed as longitudinal fracture.and vertical designed as transverse racture. to the longitudinal axis of bone were compared. In longitudinal fracture, the critical strain energy release rate Gc. of cortical bone under tension, shear, and tear was 644±102, 2430±836, and 1723±486 Nrm, respectively. In transverse fracture, the critical strain energy release rate Gc.of cortical bone under tension, shear, and tear was 1374±183, 4710±1284, and 4016±948 Nrm, respectively. An unpaired t-test analysis demonstrated that the crack initiation fracture toughness of bone under shear and tear loading were significantly greater than that under tensile loading in both longitudinal and transverse fracture P<0.0001 for all. Our results also suggest that cortical bone has been "designed" to prevent crack initiation in transverse fracture under tension, shear, and tear.
Fracture toughness, Cortical bone, Tension, Shear, Tear
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【期刊论文】Pitting behavior of SiCp/2024 Al metal matrix composites
冯祖德, Z. FENG*, C. LIN, J. LIN, J. LUO
JOURNAL OF MATERIALS SCIENCE 33(1998)5637-5642,-0001,():
-1年11月30日
The effects of the volume fraction of SiC particulate reinforcements and the concentration of chloride ions in solution on the localized corrosion characteristics of SiCp/2024 Al metal matrix composites (MMC) were investigated. A scanning micro reference electrode (SMRE) technique was employed to study the dynamic process of pitting initiation and development on the surface of the composites at open-circuit potential. Potentiodynamic polarizations were performed to characterize the electrochemical behavior of the MMCs. The morphology of the localized attack on the MMC sample after corrosion tests were examined by scanning electron microscopy (SEM). The results of electrochemical measurement showed that the composites were less resistant to pit initiation than the corresponding unreinforced metrix alloy. Increase in the volume fraction of SiC preinforcement in the SiCp/2024 Al composites resulted in a significant decrease of pitting potential. In situ potential mapping of active centers on the surfaces of the compositesrevealed that local breakdown of passivity and initiation of micro pitting corrosion could take place even at an open-circuit potential which was more negative than the pitting potential, and the number of active centers on the surfaces of the composites increased as the volume fraction of SiC particulates in MMCs increased. Micro-structural analysis indicated that pitting attack on the composites mainly occurred at SiCp-Al interfaces or inclusions-Al interfaces.
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冯祖德, S. Han*, J. Medige*, K. Faran*, Z. Feng* and I. Ziv*†
Med. Eng. Phys. Vol. 19, No.8, pp. 742-747, 1997 ,-0001,():
-1年11月30日
The ability of quantitative ultrasound to predict the mechanical properties of trabecular bone under different strain rates was investigated. Ultrasound velocity, (UV and broadband attenuation (BUA) were measured for 60 specimens of human trabecular bone. Samples were divided into two equal groups and loaded in compression at the strain rates of 0.0004 and 0.08s-1. The ultimate strength, elastic modulus, and energy absorption capacity were determined for each specimen. Specimens tested at 0.08 s-1 had a mean value of strength 63% higher than the, specimens tested at 0.0004 s-1. The elastic modulus and energyabsorption capacity were 82% and 42% higher, respectively, for the higher strain rate. UB, and BUA were significantly associated with most mechanical properties at both strain rates. All mechanical properties were also correlated, strongly with a linear combination oF UV and BUA for both the low and high loading rates. The use of ultrasound parameters may provide good clinical means for assessing the resistance of trabecular bone to both low and high energy trauma
Strain rate,, bone strength,, ultrasound velocity,, broadband ultrasound attenuation,, bone mineral density
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