close

Вход

Забыли?

вход по аккаунту

?

Metal Foam

код для вставкиСкачать
Metal Foam
Ryan McDonough
What is Metal Foam
•
•
•
•
An ultra high strength metal matrix
composite foam.
The material can be any type of metal
Even though it is metal it has
interconnecting hollow pores
Strong, light and somewhat elastic
How it Works
•
•
•
•
•
Today metal foam is thought to be used for bone implants
With normally titanium rod implants the bone and the titanium rod have a
different modulus of elasticity
The metal foam and bone have the same modulus of elasticity
Allows bone cells and blood vessels to grow into the pores of the metal
foam
Normal metal implants carry more of the weight of the body then the
bone does and can cause the surrounding bone to die.
How its made
•
There are 2 ways to make the metal foam
•
1) Salt mold•
•
•
involves pouring large grained salt into a mold, then the
salt is heated and put under pressure so they fuse together
Molten metal is then poured in the mold and fills in the
spaces between the salt grains
It is then cooled and dunked in water to dissolve the salt
leaving only the metal foam
How its Made(continued)
•
2) Plaster mold•
•
•
•
•
An open cell plastic foam is used to begin the process
The foam is filled with a dissolvable plaster making plastic
beams inside the plaster
The mold is then heated which melts the plastic
Molten metal is then squeezed into the plaster mold using
high pressure and a vacuum
The plaster is then dissolved and the foam is done
Benefits/ Limitations
•
•
Benefits
–
Less likely for the bone to reject the implant
–
Use less of whatever metal that is being used
Limitations
–
Takes a while to produce the foam
–
The process is expensive
–
Difficult to make
Sources
•
•
•
•
•
•
•
Vendra, L. "New Material Mimics Bone to Create Better Biomedical Implants." Science Daily: News & Articles in Science,
Health, Environment & Technology. Science Daily, 16 Feb. 2010. Web. 19 Nov. 2011.
<http://www.sciencedaily.com/releases/2010/02/100216113603.htm>.
Michaels, Bob. "Composite Metal Foam Material Could Be Tomorrow's Knee Cap | Qmed." Qmed | Medical Device Industry
Supplier Directory. Qmed, Apr. 2010. Web. 19 Nov. 2011. <http://www.qmed.com/mpmn/article/composite-metal-foammaterial-could-be-tomorrows-knee-cap>.
Rugani, Lauren. "Metal Foam Could Build Better Bones, Car Bumpers." Science 2.0 - В® The World's Best Scientists, the
Internet's Smartest Readers. Science 2.0, 19 Feb. 2010. Web. 19 Nov. 2011.
<http://www.science20.com/futuro/metal_foam_could_build_better_bones_car_bumpers>.
Kaiser, Tiffany. "Researchers Develop New Titanium Bone Implants." Daily Tech. Daily Tech, 23 Sept. 2010. Web. 19 Nov.
2011. <http://www.dailytech.com/Researchers+Develop+New+Titanium+Foam+Bone+Implants+/article19703.htm>.
Morton, Todd. "Titanium Foam Scaffolds Made to Match Bone's Properties." Ars Technica. Ars. Web. 19 Nov. 2011.
<http://arstechnica.com/science/news/2008/08/titanium-foam-scaffolds-made-to-match-bones-properties.ars>.
"Metal 'foam' Developed for Bone Implants - UPI.com." Latest News, Latest News Headlines, News Articles, News Video,
News Photos - UPI.com. UPI, 23 Sept. 2010. Web. 19 Nov. 2011. <http://www.upi.com/Science_News/2010/09/23/Metalfoam-developed-for-bone-implants/UPI-24901285293325/>.
Curran, Dave. "People | Dave Curran | Metal Foams." Department of Materials Science & Metallurgy, University of
Cambridge. Web. 19 Nov. 2011. <http://www.msm.cam.ac.uk/mmc/people/old/dave/dave.html>.
Документ
Категория
Презентации
Просмотров
122
Размер файла
1 600 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа