公开(公告)号：WO1997019809A1

公开(公告)日：1997-06-05

申请号：PCT/US1996018919

申请日：1996-11-27

Applicant: SERMATECH INTERNATIONAL, INC.

Inventor： SERMATECH INTERNATIONAL, INC. ,  SAHOO, Purusottam ,  SITKO, Stephen, G.

IPC: B32B09/00

CPC classification number: B05B7/226 ,  C23C4/134

Abstract: In a thermal spray apparatus (1) a plasma stream passes through a nozzle (2) towards a substrate (20). On entering the nozzle (2), the plasma stream passes through a plasma cooling passageway (10), to a plasma accelerating zone (11) defined by a narrowed passageway, and then into an expanded plasma/particle confining zone (12, 18) for the discharge of material from the nozzle (2). To apply thermal spray coatings (21) of increased hardness to a substrate (20), the ratio of length of the plasma/particle confining zone (12, 18) relative to the diameter of the plasma/particle confining zone (12, 18) is increased from the more conventional value to about 5:1, preferably to a ratio in the range of from 7:1 to 16.5:1. Ratios of from 10:1 to 13:1 have been found to achieve a particularly desirable result. Also the method and the coatings obtained.

Abstract translation: 在热喷涂装置（1）中，等离子体流通过喷嘴（2）朝向基板（20）。 在进入喷嘴（2）时，等离子体流通过等离子体冷却通道（10）到达由狭窄通道限定的等离子体加速区（11），然后进入膨胀的等离子体/颗粒限制区（12,18） 用于从喷嘴（2）排出材料。 为了将具有增加硬度的热喷涂涂层（21）施加到基底（20）上，等离子体/颗粒限制区域（12,18）的长度相对于等离子体/颗粒约束区域（12,18）的直径的比率， 从更常规的值增加到约5:1，优选为7:1至16.5:1的比率。 已经发现10：1至13：1的比例达到了特别理想的结果。 还可以获得方法和涂层。

公开(公告)号：WO1995023243A3

公开(公告)日：1995-08-31

申请号：PCT/US1995002226

申请日：1995-02-27

Applicant: SERMATECH INTERNATIONAL, INC.

Inventor： SERMATECH INTERNATIONAL, INC. ,  McMORDIE, Bruce ,  KIRCHER, Thomas, A.

IPC: C23C12/00

公开(公告)号：WO1995023877A1

公开(公告)日：1995-09-08

申请号：PCT/US1995002664

申请日：1995-03-01

Applicant: SERMATECH INTERNATIONAL, INC.

Inventor： SERMATECH INTERNATIONAL, INC. ,  SAHOO, Purusottam ,  MALLILO, Anthony

IPC: C23C04/12

CPC classification number: B05B7/226 ,  C23C4/134

Abstract: Known thermal spray apparatus are modified to achieve rough thermal spray coatings. Thermal spray apparatus operate to develop a plasma stream for introduction to a nozzle, for eventual application to the surface of a substrate. Upon entering the nozzle, the plasma stream is passed through a plasma cooling zone defined by a plasma cooling passageway, to a plasma accelerating zone defined by a narrowed passageway that expands into a plasma/particle confining zone for the discharge of material from the apparatus. The narrowed passageway of the apparatus is cooled, and the powder material to be applied by the apparatus is introduced into the plasma stream along the cooled, narrowed passageway. For the appropriate heating (melting) and acceleration of MCrAlY powder particles, for application to the substrate which is to receive the thermal spray coating, the ratio of the initial (plasma cooling) passageway relative to the narrowed (plasma accelerating) passageway is reduced from the more conventional value of about 4:1 to a ratio of 2:1 or less.

Abstract translation: 修改已知的热喷涂设备以实现粗糙的热喷涂。 热喷涂装置用于开发用于引入喷嘴的等离子体流，以最终施加到基板的表面。 在进入喷嘴时，等离子体流通过由等离子体冷却通道限定的等离子体冷却区域到由扩大成等离子体/颗粒限制区域的狭窄通道限定的等离子体加速区域，以从装置中排出材料。 将设备的狭窄通道冷却，并将由设备施加的粉末材料沿冷却的狭窄通道引入等离子体流中。 为了适用于MCrAlY粉末颗粒的加热（熔化）和加速，为了应用于接受热喷涂的基材，初始（等离子体冷却）通道相对于变窄的（等离子体加速）通道的比例从 约4：1的比较常规值为2：1以下。