AW: Alumina and SiC printing with zcorp's Z402

Date: Thu Jan 13 2000 - 16:40:18 EET

Hi Alex,

I am trying to use also other materials with our Zcorp machine.
Did you get good results in using Alumina on the Zcorp.
How big is the grain size of the Alumina powder you are using, how much
hand-finish you have to do afterwards.
I am looking also for a material which gives you elastic parts on the Zcorp
similar to the Somos201 for SLS machines.
Did somebody any tests with this kind of material.


Jan Hill

Jan Hill
adidas-Salomon AG
Adi-Dassler-Straße 1-2/ Bldg VIII
91074 Herzogenaurach
phone: +49 (0) 9132/ 844042
fax: +49 (0) 9132/ 844054

-----Ursprüngliche Nachricht-----
Von: Alex Salvi [mailto:ASalvi@MMCCINC.COM]
Gesendet am: Mittwoch, 12. Januar 2000 22:07
An: 'Brock Hinzmann'; Rapid Prototyping Mailing List (E-mail)
Cc: Jim Cornie
Betreff: RE: Alumina and SiC printing with zcorp's Z402

thanks for the information. We are in fact working with aerospace firms on
both rp of alumina and rp of SiC. I would really appreciate it if you could
get me a contact name at SRI International.
Alex Salvi

-----Original Message-----
From: Brock Hinzmann []
Sent: Wednesday, January 12, 2000 1:17 PM
To: Alex Salvi
Subject: RE: Alumina and SiC printing with zcorp's Z402


SRI International (formerly the Stanford Research Institute) has
developed a machine that prints parts from virtually any powder starting
but the emphasis has been on ceramics for DoD applications. Silicon
nitride has been the primary material, but my understanding is they also
printed some silicon carbide parts. The Si3N4 parts were for gas turbine
and were tested by Allison (now RR) in testing chambers under high-temp
operating conditions and were found to be as good as or better than the
same parts made by conventional methods, in terms of density, operating
temperature capabilities, and several other characteristics. Accuracy is
probably not what is needed in some applications, but the machine uses a
microelectromechanical optical system that has potential for greater

The application you mention is not one they are working on, although
interest has been expressed in this area by other aerospace firms (besides

As far as I know, the current status of the program is to build and sell
a few beta test machines (three have been ordered, at about $50k each). I
can connect you, if you are interested.

Brock Hinzmann
Business Intelligence Center
SRI International

Alex Salvi wrote:
>Hello Dr. Ana Garcia (and anyone else interested of course)
>I have been reading the 1999 postings to the mailing list and two emails
>that you sent caught my attention. In one you said you were doing
>on rapid prototyping devices to do work with AlSiC and in the other you
>mentioned the Z402 3d printer used for casting joints of the millenium
>I am currently using our Z402 printer to print both SiC as well as
>parts which we cast to make metal matrix composites. Our alloys are
>aluminum, copper and magnesium.
>If you or anyone you know is working on this I thought we might share
>Alex Salvi
>Chief Design Engineer
>Metal Matrix Cast Composites, Inc.
>101 Clematis Ave.
>Waltham, MA 02453
>Phone: (781) 893-4449 x25
>Fax: (781) 893-7230
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