1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2003 06 26 Revised Para 3.0 inserted; Para 3.1, 3.10, 4 deleted 1990 07 11 DE00E00107002060 Revised Para 3.2.1, 3.6, 3.8, Fig. 2 1989 08 22 DE00E00107002031 Released J.B. Huebner Printed copies are uncontrolled Copyright 2003, Ford Global Tech
2、nologies, Inc. Page 1 of 4 CERAMIC POWDER ALUMINUM OXIDE PLASMA SPRAYED ESF-M3L88-A 1. SCOPE The material defined by this specification is an aluminum oxide ceramic powder (AL2O3). It is also referred to as alumina. 2. APPLICATION This specification was released to define a material to be used in an
3、 arc plasma spray application of an alumina coating on the aluminum control plate of the 3rd generation alternator series. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materi
4、als (WSS-M99P1111-A). 3.2 To be verified on each incoming lot by inspection or certification of compliance from the supplier. 3.2.1 Composition Shall conform to the following weight percents, determined by methods agreed upon by purchaser and supplier. The material shall be prepared by a fusion proc
5、ess and be categorized as a low soda alumina. Compound Weight Percent (maximum) SiO20.10 Fe2O30.10 CaO 0.05 Na2O 0.10 Other 0.25 Al2O3Remainder (by Difference 1.0%) H2O 3.2.2 Visual Appearance Of Powder The powder shall appear white, be free flowing and be free from agglomerates. ENGINEERING MATERIA
6、L SPECIFICATIONESF-M3L88-APrinted copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 2 of 4 3.3 SPECIFIC GRAVITY 3.65 3.90 (ASTM C 135) 3.4 PHASE COMPOSITION DETERMINED BY XRAY DIFFRACTION Alpha Alumina 100% (approx.) Na Beta Alumina Trace 3.5 MICROEXAMINATION The photomicro
7、graph in Figure 1 is an indication of the appearance of the material. 3.6 PARTICLE SIZE DISTRIBUTION Shall meet the requirements of Figure 2 when tested by a method mutually agreeable to the purchaser and the supplier. No material will be larger than 53 micrometers (270 mesh screen) with a maximum 5
8、 by weight in the particle size range of 44 to 53 micrometers. Any material having particles less than 10 micrometers shall not exceed 5% by weight of the product and at less than 5.0 micrometers not to exceed 1.0%. The calculated nominal average may range from 20 to 25 micrometers. 3.7 PLASMA SPRA
9、YING Powder shall be capable of producing acceptable plasma spray coatings to standards agreed upon by purchaser and supplier using the plasma spray parameters defined by purchaser. 3.8 DIELECTRIC BREAKDOWN The powder shall be capable of producing a plasma spray coating able to withstand a dielectri
10、c breakdown when sprayed to a thickness of 0.165 +/- 0.004 mm and subjected to 500 volts DC. Testing shall be carried out in the following manner: The parts with the coating shall be heated at 100 C for a minimum of 10 minutes in a suitable oven. Upon removing from the oven and while still at an ele
11、vated temperature (if the coatings cool to room temperature, they are to be reheated as described above), an uncoated area of the part shall be connected to the negative electrode from the test stand. The positive electrode shall be used to probe the coating surface, subjecting it to an electrical s
12、tress of 500 volts DC. The coating is to remain intact and show a maximum leakage current of 60 microamps through the coating. The specific test stand to be used for this test shall be determined by the purchaser and supplier. 3.9 COATING ADHESION BOND STRENGTH The powder, when sprayed according to
13、the purchasers process parameters, will produce a coating with an adhesion bond strength of 5.6 MPa minimum on an aluminum surface. The test procedure will comply with ASTM C633 with any necessary modifications to be agreed upon by the purchaser and supplier. ENGINEERING MATERIAL SPECIFICATIONESF-M3L88-APrinted copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 3 of 4 ENGINEERING MATERIAL SPECIFICATIONESF-M3L88-APrinted copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 4 of 4
