Big WOW !
Just under my nose, and I didn't see it. You have no idea what splendid
answer you just delivered, Leo!
May tell you why some day...
Will save this mail as 'special' TN matter
Many thanks!
Inge
----- Original Message -----
From: "Leo Higgins" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, March 23, 2007 7:19 AM
Subject: Re: [TN] AlSiC
Check http://www.alsic.com/
The company is now called CPS Technologies, and was formerly called Ceramic
Process Systems, an old spin-off from MIT that was started in the early
80's. They have been making AlSIC as long or longer than anybody, and they
have used the molten aluminum impregnation method for many years. I do not
know about their plating of the AlSIC.
Best regards,
Leo
Leo M. Higgins III, Ph.D.
Sr. Vice President, Engg and Technology
ASAT, Inc.
13809 Research Blvd., Suite 635
Austin, Texas 78750
office phone 512-249-4758
mobile 512-423-2002
[log in to unmask]
www.asat.com
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Creswick, Steven
Sent: Thursday, March 22, 2007 7:20 AM
To: [log in to unmask]
Subject: Re: [TN] AlSiC
Ingemar,
I am still going to have to do more digging. I could have sworn that it
was either PCC Composites or Lanxide Electronic Components that inserted
the pre-compressed slug into the mold then infiltrated around it - but a
quick look on their sites did not reveal it to me. Possibly my info is
out of date and they dropped this.
This is what I have for now, but will look further. Have files at home
that moved with me that will take some digging to find the pearls I am
searching for. Will scrounge through them this weekend.
Lanxide Electronic Components
http://www.patentstorm.us/patents/5526867.html
PCC-Advanced Forming Technology
http://www.matweb.com/search/SpecificMaterialText.asp?bassnum=NZMPC0
http://www.pcc-aft.com/
http://www.mmmt.com/Profile.html
http://www.mc21inc.com/
Regarding flight time/fuel capacity. I can carry up to 14 gal US [53L].
Fuel consumption rate is 2-2.5 Gal/hr [7.5-9.5L/hr]. Airspeed is 30
miles per hour [48 km/hr], so if I have a 10 mph tailwind, by ground
speed is a whopping 40 mph [68 km/h]! Powered parachutes are not for
long distance flights. Low and slow!
Legally we can go up to 10,000 ft, but I have not gone above 3500 ft -
imagine being strapped into your kitchen chair, in the open, at 10,000
ft! Not sure even I am ready for that. My radar cross-section is
small. See no need to be up where the 'big boy' commercial aviation
aircraft are!
At 200-2000 ft, ones gets an entirely new appreciation for the sights
and smells of the earth below.
You should visit your local flight park and hitch a ride. Wear warm
clothes and bring a camera with good strap on it. Also have someone on
the ground take a picture after you land - showing the look of wonder
.....or terror [sorry, could not resist] :-)
I know of a local flight instructor that took up an 80 year old
gentlemen a year or so back. The guy just loved it!! My wife even
likes to go up with me, and she does not like heights! She will not
climb a step ladder more than about a meter or so. One is strapped in
quite well, so you get the feeling of being part of the machine -
especially in the back seat - which is what allows her to overcome her
fears. She immensely enjoys the view, but not cold temperatures.
The chute is already deployed. Power-lines are our worst enemy.
Steve
-----Original Message-----
From: Hernefjord Ingemar [mailto:[log in to unmask]]
Sent: Thursday, March 22, 2007 3:05 AM
To: TechNet E-Mail Forum; Creswick, Steven
Subject: RE: [TN] AlSiC
Yes, please, if not taking too much of your flight time.
(Thanks for trike pictures. What if Leonardo had seen that? "YES! YES! I
knew it would work! " There is a small club nearby, just about 10
members, I hear them long before they appear in the sky. Sounds like
midgets. How far can you go on normal fuel tank?)
Inge
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Creswick, Steven
Sent: den 21 mars 2007 12:16
To: [log in to unmask]
Subject: Re: [TN] AlSiC
Ingemar,
It would seem that the SiC matrix should have been fully infiltrated
with the molten Al. Maybe you did not expect the blisters to be from
gas entrapment... What do you believe the source of the blistering to
be?
There was a time when someone was taking the AlSiC 'slug' and placing
that inside an aluminum casting - which could later be milled down, but
still leaving aluminum over the AlSiC slug.
>From there plating was a snap.
Want me to dig out who it was that did it?
Steve
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge
Sent: Tuesday, March 20, 2007 3:39 PM
To: [log in to unmask]
Subject: [TN] AlSiC
Honoured Messieurs wet chemists,
have to make solderable finish on AlSiC substrates. Got copper plated
samples from manufacturer. We did usual 300 Centigrade blister test, and
as expected, large blisters were created. Now, what suitable finish do
you recommend? Would like to try nickel sputter+electrolytic nickel+gold
flash, but there may be wet chemistry for the adhesion layer instead of
sputtering or thermal spray. There are tin plating methods too, but
they seem not to be for soldering , but rather act as environment
protection coatings.
Inge
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