Missoula, MT, United States
Missoula, MT, United States

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Cheng Y.H.,American Eagle Instruments Inc. | Browne T.,American Eagle Instruments Inc. | Heckerman B.,American Eagle Instruments Inc. | Meletis E.I.,University of Texas at Arlington
Surface and Coatings Technology | Year: 2011

TiCN coatings with different C content were deposited using a large area filtered arc deposition (LAFAD) technique from Ti targets in a mixture of N2 and CH4 gases. Scanning electron microscopy (SEM), nano-indentation, and pin-on-disc tribometer were used to characterize the cross-sectional microstructure, hardness, modulus, wear rate, and friction coefficient of the TiCN coatings. The increase in the CH4 fraction in the gases leads to a continuous increase in the deposition rate of the TiCN coatings as well as an increase in the defect density in the coatings. Nano-indentation results indicate that with an increase of the C content in the coatings, the hardness and elastic modulus increase to a maximum at a C content of 2.8at.%, then decreases rapidly, which results from the increase in the defect density in the coatings. Tribological test results show that when tested against Al2O3 balls, there is no significant change in the friction coefficient (0.78-0.88) of the TiCN coatings with a C content of below 4.6at.%, but the friction coefficient decreases rapidly to 0.21 with a further increase in the C content to 9.3at.%. In addition, with increasing C content in the coatings from 0 to 9.3at.%, the wear rate decreases remarkably from 2.5×10-6mm3/Nm to 5.3×10-7mm3/Nm. The low friction coefficient and the formation of a transfer layer correspond to the low wear rate for the TiCN coatings with high C content. © 2011 Elsevier B.V.


Cheng Y.H.,American Eagle Instruments Inc. | Browne T.,American Eagle Instruments Inc. | Heckerman B.,American Eagle Instruments Inc. | Meletis E.I.,University of Texas at Arlington
Surface and Coatings Technology | Year: 2010

TiSiN coatings with a thickness of 2.5 μm were deposited using a Large Area Filtered Arc Deposition (LAFAD) technique with TiSi targets having different Si content. The influence of the Si content in the coatings on the mechanical properties and tribological behaviors of the TiSiN coatings were systematically studied using nanoindentation and a pin-on-disk tribometer. Nanoindentation results show that the hardness and Young's modulus of the TiSiN coatings increase with increasing Si content in the coatings. Wear test results indicate that the wear rate and friction coefficient of the 440a stainless steel coupons were significantly reduced by deposition of the TiSiN coatings, and the tribological behaviors of the TiSiN coatings are strongly dependent on the Si content in the coatings and the testing ball material. TiSiN coatings exhibit similar friction coefficient when tested against Al2O3 and 302 stainless steel balls, but increasing Si content in the coatings causes an increase in the friction coefficient of the TiSiN coatings. With the increase in the Si content in the coatings, the wear rate of the TiSiN coatings decreases when tested against Al2O3 balls, but increases significantly when tested against 302 stainless steel balls. The capability of forming a transfer layer on the ball surface contributes to the change in the friction coefficient and wear rate with Si content in the coating and ball materials. © 2009 Elsevier B.V.


Cheng Y.H.,American Eagle Instruments Inc. | Browne T.,American Eagle Instruments Inc. | Heckerman B.,American Eagle Instruments Inc.
Wear | Year: 2011

CrN coatings were deposited using a large area filtered cathodic arc deposition (LAFAD) technique from Cr targets under the atmosphere of pure N 2 at a pressure of 0.02Pa and temperature of 350°C. The mechanical and tribological properties of the CrN coatings were characterized using nanoindentation and pin-on-disk tribometer. The mechanical and tribological properties of the TiN coatings deposited by the same technique were also included as a reference. It was found that CrN coatings possess lower hardness and elastic modulus than that of the TiN coatings. As compared with TiN coatings, when tested against Al 2O 3 balls, CrN coatings exhibit much lower friction coefficient (0.39) and wear rate (1.3×10 -7mm 3/Nm), but the Al 2O 3 balls have much higher wear rate when tested against CrN coatings. When 302 stainless steel balls were used, both CrN and TiN coatings have similar friction coefficient, and the balls were seriously worn with a comparable wear rate when tested against the two coatings. No wear of CrN and TiN coatings could be seen. However, wear debris deposited on the coating surface with a similar deposition rate. The wear mechanisms of the CrN coatings are abrasion and adhesion wear, respectively, when tested against Al 2O 3 and 302 stainless steel balls. © 2011 Elsevier B.V.


Trademark
American Eagle Instruments Inc. | Date: 2014-08-25

Dental hand instruments; namely, diagnostic, periodontal/hygiene, composite, operative and endodontic hand instruments; dental instrument sharpening stones; and dental and medical sterilization units.


Trademark
American Eagle Instruments Inc. | Date: 2016-12-16

Dental instruments for use in periodontal procedures.


Patent
American Eagle Instruments Inc. | Date: 2014-02-28

An electrical discharge irrigation device and method is described. An electrical discharge irrigation device includes a power source, a circuit coupled to the power source, and an output tip coupled to the circuit. The output tip includes a first end and a second end and a longitudinal axis extending between them, an electrode located in an interior space of the output tip configured to receive an electrical charge from the circuit and to release an electric discharge, and a ground return including an inner surface of the output tip, wherein a space between the electrode and the ground return comprises a conductive medium, the conductive medium being in contact with the electrode and the ground return to produce the electric discharge.


Patent
American Eagle Instruments Inc. | Date: 2013-09-20

An electrical discharge irrigation device and method is described. The device includes a power source to produce a first voltage, a circuit coupled to the power source to convert the first voltage to a second voltage, a discharge capacitor to receive the second voltage from the circuit, at least one of a transistor and a controlled rectifier coupled to the discharge capacitor to receive the second voltage, and an output tip. This output tip is coupled to the at least one of a transistor and a controlled rectifier and includes a first end and a second end and a longitudinal axis extending between them, an electrode located in an interior space of the output tip configured to receive an electrical charge from the at least one of a transistor and a controlled rectifier and to release an electric discharge, and a ground return. The ground return is an outside surface of the output tip and a space between the electrode and the ground return holds a conductive medium so that the conductive medium is in contact with the electrode and the ground return to produce the electric discharge.


Patent
American Eagle Instruments Inc. | Date: 2012-12-17

An electrical discharge irrigation device includes a power source to produce power of a first voltage, a circuit coupled to the power source to convert the power of the first voltage to power of a second voltage where the second voltage is higher than the first voltage, a trigger to activate the circuit, an igniter coupled to the circuit to produce a spike, an electrical charge storage component coupled to the igniter the electrical charge storage component becoming conductive and storing an electrical charge after receiving the spike, and an output tip. The output tip includes an electrode and insulating material as an outer layer.


Patent
American Eagle Instruments Inc. | Date: 2012-11-29

A device and method of using a device for photon-induced endodontic and periodontic applications includes a power source, a trigger coupled to the power source and circuit elements initiated by the trigger. The circuit elements include a timing circuit and a driver. A light source is coupled to the circuitry elements wherein and driver controls the period, cycle, and pulse generation of the light source to create photon induced acoustic waves. The optical assembly includes a fiber optic cable and an output tip and is coupled to the light source. This optical assembly refracts light from the light source and photon induced acoustic waves exit the output tip in a pre-determined pattern.


Patent
American Eagle Instruments Inc. | Date: 2015-01-15

An ultrasonic instrument includes a tip portion, a transducer configured to convert electrical energy into vibrational energy, an acoustic transformer interconnecting the transducer and the tip portion, and a grip portion disposed at least partially about the acoustic transformer. The grip portion is coupled to the acoustic transformer via a resilient nodal coupling at a nodal region of the acoustic transformer. The resilient nodal coupling is configured to provide rotational and axial stability to the acoustic transformer.

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