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#26 2019-08-13 20:08:53

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 16,198

Re: Technology needed for Mars

Seems that we have yet another use for Carbon Nanotubes as these Damaged hearts rewired with nanotube fibers

Researchers at Texas Heart Institute and Rice University have confirmed that flexible, conductive fibers made of carbon nanotubes can bridge damaged tissue to deliver electrical signals and keep hearts beating despite congestive heart failure or dilated cardiomyopathy. Thin, flexible fibers made of carbon nanotubes have now proven able to bridge damaged heart tissues and deliver the electrical signals needed to keep those hearts beating.

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#27 2019-10-08 08:54:41

tahanson43206
Member
Registered: 2018-04-27
Posts: 1,076

Re: Technology needed for Mars

For SpaceNut re topic ...

I let a newsletter offer tempt me into subscribing recently.

This item may be of interest to a forum reader down the line:

http://www.ti.com/lit/an/sboa344/sboa344.pdf

You have to sign up to see the full article but subscription is free.

Kirby Kruckmeyer
ABSTRACT
Historically, satellite programs have used space grade, hermetically sealed, QML-V qualified components
for enhanced reliability and radiation hardness. With the emergence of “NewSpace,” there has been more
interest in using plastic encapsulated microcircuits (PEM) in space for a variety of reasons. NewSpace is a
loosely defined term covering some of the trends in the space ecosystem, including the emerging private
spaceflight industry and programs that have reduced reliability, lifetime, and radiation requirements. PEMs
become more attractive because leading edge products are not available as space qualified products and
PEMs generally have smaller footprints and are lighter than the ceramic packages used in space qualified
products. It has been recognized that there is a quality and reliability risk in using commercial-off the shelf
(COTS) products and some space programs have been investigating using automotive grade AEC-Q100
products with more stringent qualification requirements. However, the extra qualification steps in Q100
parts do not meet all the requirements of a space application, even for those space applications with
reduced requirements. For instance, commercial low earth orbit (LEO) applications with a projected three
year life still have to meet radiation goals that many PEM products do not survive. One of the biggest
challenges for a satellite program is finding and then testing those products that meet the radiation goals.
Although radiation performance may be biggest obstacle to using some COTS or automotive products in
space, there are a number of other risks and factors to consider, such as tin whiskers, copper bond wires,
rated temperature range, and package outgassing. How is a customer to know if a product has the right
stuff to even be considered for a space mission?

I have omitted the name of the corporate underwriter to fit with forum tradition.

(th)

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#28 2019-10-08 16:53:29

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 16,198

Re: Technology needed for Mars

Some of the once damaging effects of radiation have gotten less as the parts get smaller and with much more testing after coating the parts with conformal coatings they are pretty much sealed from anything that would cause corrosion or moisture to get into the circuits.

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