PSI - Issue 40

M.V. Fedorov et al. / Procedia Structural Integrity 40 (2022) 136–144 Fedorov M. V. at al. / Structural Integrity Procedia 00 (2019) 000 – 000

138

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4. Results and Discussions. Micro X-ray spectral and X-ray diffraction analysis showed the correspondence of the elemental composition of the initial sample and the presence of impurities that are contained in the products of obtaining powder materials. X-ray phase analysis established the following: WC-Co hardmetal powder (8%) consists of tungsten carbide as the primary phase and W 2 C and Co as impurities. The X-ray diffraction pattern of a tungsten carbide sample corresponds to the XRD pattern of tungsten carbide; the comparison card for the cusongite mineral is WC. Cobalt consists of β -cobalt and α -cobalt phases. Table 1 - 3 shows the obtained results of X-ray spectral analysis of the initial powders. Figure 1 shows fragments of determining the quantitative composition in photographs of powders with a magnification of 1000 times. Figure 2 presents the X-ray diffraction patterns of the initial powders.

(a)

(b)

(c)

Fig. 1. A fragment with a magnification of 1000 times: (а) Co (Table 1); (b) WC-WC (Table 2); (c) WC-Co (8%) (Table 3).

Table 1. The quantitative composition of the elements of initial Co powder (%wt.) Spectrum In stats. C Co W O

Fe

Total

1 2 3

Yes Yes Yes

2.68

93.11 96.32 95.31 96.32 93.11

4.21 3.68 4.69 4.69 3.68

100.00 100.00 100.00

Max. Min.

2.68 2.68