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LEADER 03440nam a2200685Ia 4500

001 ocn227939125;

003 OCoLC;

005 20141212054344.0;

006 m d f ;

007 cr bn|||||||||;

008 080513s2000 mdua ob f000 0 eng d;

027 a| ARL-TR-2358;

029 0 a| DTICEb| ADA384981;

035 a| (Sirsi) o227939125;

035 a| (OCoLC)227939125;

040 a| DTICEc| DTICEd| GPOd| UtOrBLW;

049 a| ERE#;

074 a| 0324-A-01 (online);

086 0 a| D 101.133:2358;

100 1 a| Beyer, Richard A.q| (Richard Anthony)=| ^A1030764;

245 10 a| Evaluation of ALON for cannon window application /c| Richard A. Beyer, Henry Kerwien.;

260 a| Aberdeen Proving Ground, MD :b| Army Research Laboratory,c| [2000];

300 a| 1 online resource (viii, 16 pages) :b| digital, PDF file.;

336 a| text2| rdacontent;

337 a| computer2| rdamedia;

338 a| online resource2| rdacarrier;

490 1 a| ARL/TR ;v| 2358;

500 a| "October 2000.";

504 a| Includes bibliographical references (p. 11).;

506 a| APPROVED FOR PUBLIC RELEASE.;

520 a| In applying laser ignition to large-caliber cannons, a critical element is the window into the cannon chamber to admit the laser energy. This window must repeatedly withstand a particularly harsh environment of highly reactive, high temperature combustion products from the gun propellant at pressures up to 440 MPa (65,000 psi). Failure of the window can be caused by either thermal gradients in the window, mechanical force, or a combination. Previous successes with single-crystal sapphire have sometimes been limited by window deterioration modes suggestive of crystalline behavior. Samples of aluminum oxynitride spinel (ALON) have been fabricated in the same design as the standard sapphire windows and were qualified for gun testing. This process involves a series of experiments in a closed chamber, where gun propellant is burned to generate an environment similar to that inside the gun. Windows mounted in two methods have been tested. One of these windows has survived the full pregun test series with no visible damage.;

650 0 a| Ordnance.=| ^A80096;

650 0 a| Lasers.=| ^A12453;

650 0 a| Aluminum compounds.=| ^A650407;

650 17 a| Guns.2| scgdst;

650 17 a| Firing mechanisms(weapon)2| dtict;

650 17 a| Windows.2| dtict;

650 17 a| Blast loads.2| dtict;

650 17 a| Spinel.2| dtict;

650 17 a| Oxynitrides.2| dtict;

650 27 a| Firing tests(ordnance)2| dtict;

650 27 a| Single crystals.2| dtict;

650 27 a| Laser beams.2| dtict;

650 27 a| Sapphire.2| dtict;

650 27 a| Guns.2| dtict;

650 27 a| Gun propellants.2| dtict;

650 27 a| Ignition systems.2| dtict;

650 27 a| Combustion products.2| dtict;

653 2 a| CANNONS;

653 2 a| ALON(ALUMINUM OXYNITRIDES);

653 2 a| PE62218A;

700 1 a| Kerwien, Henry.?| UNAUTHORIZED;

710 2 a| U.S. Army Research Laboratory.=| ^A367731;

830 0 a| ARL-TR (Aberdeen Proving Ground, Md.) ;v| 2358.=| ^A566074;

856 40 u| http://purl.fdlp.gov/GPO/gpo1116;

949 a| Click on web addressw| ASISh| JOYNER94;

596 a| 1;

998 a| 2379711;

999 a| CLICK ON WEB ADDRESSw| ASISc| 1i| 2379711-1001l| JNETm| JOYNERr| Ys| Yt| JNE1DOu| 12/13/2010x| EDOCUMENTz| JERESOURCE;

Evaluation of ALON for cannon window application / Richard A. Beyer, Henry Kerwien.

Author/creator	Beyer, Richard A.
Other author	Kerwien, Henry.
Other author	U.S. Army Research Laboratory.
Format	Electronic
Publication Info	Aberdeen Proving Ground, MD : Army Research Laboratory, [2000]
Description	1 online resource (viii, 16 pages) : digital, PDF file.
Supplemental Content	http://purl.fdlp.gov/GPO/gpo1116
Subjects	Ordnance. Lasers. Aluminum compounds.

Series	ARL/TR ; 2358 ARL-TR (Aberdeen Proving Ground, Md.) ; 2358. ^A566074
Abstract	In applying laser ignition to large-caliber cannons, a critical element is the window into the cannon chamber to admit the laser energy. This window must repeatedly withstand a particularly harsh environment of highly reactive, high temperature combustion products from the gun propellant at pressures up to 440 MPa (65,000 psi). Failure of the window can be caused by either thermal gradients in the window, mechanical force, or a combination. Previous successes with single-crystal sapphire have sometimes been limited by window deterioration modes suggestive of crystalline behavior. Samples of aluminum oxynitride spinel (ALON) have been fabricated in the same design as the standard sapphire windows and were qualified for gun testing. This process involves a series of experiments in a closed chamber, where gun propellant is burned to generate an environment similar to that inside the gun. Windows mounted in two methods have been tested. One of these windows has survived the full pregun test series with no visible damage.
General note	"October 2000."
Bibliography note	Includes bibliographical references (p. 11).
Access restriction	APPROVED FOR PUBLIC RELEASE.
Issued in other form	Paper version: Beyer, Richard A. (Richard Anthony). Evaluation of ALON for cannon window application. viii, 16 p.
Technical rpt#	ARL-TR-2358
GPO item number	0324-A-01 (online)
Govt. docs number	D 101.133:2358

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Evaluation of ALON for cannon window application / Richard A. Beyer, Henry Kerwien.

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