HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Engineering Materials

Ceramic Matrix Composites LEAP to High Volumes

NO RATINGS
View Comments: Newest First|Oldest First|Threaded View
Page 1/2  >  >>
Ann R. Thryft
User Rank
Blogger
Re: CERAMIC MATRIX COMPOSITES
Ann R. Thryft   11/25/2013 5:38:52 PM
NO RATINGS
bobjengr, how interesting to know that you've worked at GE. Thanks for the history and perspective.

I grew up associating the company with solid, mid-market appliances (and continue to buy them although now they're apparently considered low end). But the more I learn about its innovative R&D, the more impressed I am at what they've been doing with their deep pockets. For their jet engines, they're working on three different bleeding-edge technologies and helping to make them all happen at industrial strength in high volumes: carbon composite, CMCs, and 3D printing.

bobjengr
User Rank
Platinum
CERAMIC MATRIX COMPOSITES
bobjengr   11/25/2013 5:32:57 PM
NO RATINGS
Very interesting post Ann.  I retired from GE in 2005 and there was some indication at that time "aircraft engines" was working steadily on composite structures.  As you mentioned in your article, it's an evolution and not a revolution.  One of the great problems with "jet engines" is heat—the great enemy.  While in the Air Force, I was able to see the SR-71 and work around that "beast".  After every few flights, the turbine blades would need replacing due to the heat generated during flight.    Again, great post.

Ann R. Thryft
User Rank
Blogger
Re: How formed?
Ann R. Thryft   11/22/2013 11:44:55 AM
NO RATINGS
Like we said in the article, GE has been investing R&D funds and working on this process for over 30 years. So has Rolls-Royce, another company with deep pockets. So it's evolution rather than revolution and the tipping point finally got reached. It's easy to find general info on CMCs by googling the term. Here's a good background article in a vertical publication:
http://www.compositesworld.com/articles/ceramic-matrix-composites-heat-up

Ann R. Thryft
User Rank
Blogger
Re: How formed?
Ann R. Thryft   11/22/2013 11:43:16 AM
NO RATINGS
TJ, there are several different methods for making these, just as there are in other types of composites that embed fibers in a matrix. GE embeds silicon carbide ceramic fibers in a ceramic resin matrix, which is then coated with a proprietary material. It's processed in an autoclave oven and there's some post-processing including burnout, but they aren't giving out a lot of details on exactly what else is involved, nor is CFM. Here's a promotional video that tells us a little: start at 1 minute 45 seconds in: http://www.youtube.com/watch?v=666VH25FeG0

RogueMoon
User Rank
Gold
Re: How formed?
RogueMoon   11/22/2013 9:43:24 AM
NO RATINGS
I'm with TJ on this one.  How are these materials made?

CMC's have been talked about for decades.  What has changed to cause GE to pony up the funds to go mass production on these?  Something must have gotten radically cheaper.

TJ McDermott
User Rank
Blogger
How formed?
TJ McDermott   11/22/2013 2:15:23 AM
NO RATINGS
Ann, do you know how the parts are formed?  Are they milled?  Molded?  Cast?

Rob Spiegel
User Rank
Blogger
Re: A big leap forward
Rob Spiegel   11/22/2013 12:39:12 AM
NO RATINGS
I agree, Ann, this really is good to see. With the composite's ability to withstand high temperatures and other durability factors, and its light weight, I would imagine the applications are endless once it really gets going.

Ann R. Thryft
User Rank
Blogger
Re: A big leap forward
Ann R. Thryft   11/21/2013 5:49:59 PM
NO RATINGS
GE has really been out there at the head of the pack in developing this material for some very tough environments. I'm glad to see it finally getting into high-volume production.

Rob Spiegel
User Rank
Blogger
Re: A big leap forward
Rob Spiegel   11/21/2013 1:32:23 PM
NO RATINGS
Sometimes it's fun to invite a pun disaster in a headline. The article was terrific, and it's good to see composites take center stage in delivering on their promise of lightweight strength and durability.

Ann R. Thryft
User Rank
Blogger
Re: A big leap forward
Ann R. Thryft   11/21/2013 1:03:42 PM
NO RATINGS
My husband probably should have been a philosophy professor; he certainly thinks like one. Many intelligent people I know think puns are a high art form, but I beg to disagree. Like you, I think that honor goes to irony, and also to sarcasm. I knew better, but it made the headline short and succinct.

Page 1/2  >  >>
Partner Zone
More Blogs from Engineering Materials
An MIT research team has invented what they see as a solution to the need for biodegradable 3D-printable materials made from something besides petroleum-based sources: a water-based robotic additive extrusion method that makes objects from biodegradable hydrogel composites.
Polish design firm NAS-DRA has proposed parasitic robotic drones that capture carbon dioxide from the air during the day and release it at night to plants growing on their wings.
Alcoa has unveiled a new manufacturing and materials technology for making aluminum sheet, aimed especially at automotive, industrial, and packaging applications. If all its claims are true, this is a major breakthrough, and may convince more automotive engineers to use aluminum.
NASA has just installed a giant robot to help in its research on composite aerospace materials, like those used for the Orion spacecraft. The agency wants to shave the time it takes to get composites through design, test, and manufacturing stages.
The European Space Agency (ESA) is working with architects Foster + Partners to test the possibility of using lunar regolith, or moon rocks, and 3D printing to make structures for use on the moon. A new video shows some cool animations of a hypothetical lunar mission that carries out this vision.
Design News Webinar Series
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
12/10/2014 8:00 a.m. California / 11:00 a.m. New York
11/19/2014 11:00 a.m. California / 2:00 p.m. New York
11/6/2014 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  67


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service