The measurement results concerning the abrasive wear of AlSi11-SiC particles composites are presented in paper. The method of
preparing a composite slurry composed of AlSi11 alloy matrix and 10, 20% vol.% of SiC particles, as well as the method of its highpressure
die casting was described. Composite slurry was injected into metal mould of cold chamber pressure die cast machine and
castings were produced at various values of the piston velocity in the second stage of injection, diverse intensification pressure values, and
various injection gate width values. Very good uniform arrangement of SiC particles in volume composite matrix was observed and these
results were publicated early in this journal. The kinetics of abrasive wear and correlation with SiC particles arrangement in composite
matrix were presented. Better wear resistance of composite was observed in comparison with aluminium alloy. Very strong linear
correlation between abrasive wear and particle arrangement was observed. The conclusion gives the analysis and the interpretation of the
obtained results.
The paper presents the method of preparing a composite slurry composed of AlSi11 alloy matrix and 10 vol.% of SiC particles, as well as
the method of its high-pressure die casting and the measurement results concerning the tensile strength, the yield point, the elongation and
hardness of the obtained composite. Composite castings were produced at various values of the piston velocity in the second stage of
injection, diverse intensification pressure values, and various injection gate width values. There were found the regression equations
describing the change of mechanical properties of the examined composite as a function of pressure die casting process parameters. The
conclusion gives the analysis and the interpretation of the obtained results.
The work presents the investigation results concerning the structure of composite pressure die castings with AlSi11 alloy matrix reinforced
with SiC particles. Examination has been held for composites containing 10 and 20 volume percent of SiC particles. The arrangement of
the reinforcing particles within the matrix has been qualitatively assessed in specimens cut out of the castings. The index of distribution
was determined on the basis of particle count in elementary measuring fields. The tensile strength, the yield point and elongation of the
obtained composite were measured. Composite castings were produced at various values of the piston velocity in the second stage of
injection, diverse intensification pressure values, and various injection gate width values. The regression equation describing the change of
the considered arrangement particles index and mechanical properties were found as a function of the pressure die casting parameters. The
infuence of particle arrangement in composite matrix on mechanical properties these material was examined and the functions of
correlations between values were obtained. The conclusion gives the analysis and the interpretation of the obtained results.
Takotsubo cardiomyopathy (TCM) represents an acute systolic left ventricular dysfunction typically triggered by severe psychological or physical stress. Oncological patients due to emotional distress of the diagnosis, proinflammatory and prothrombotic nature of cancer and also physical stress often following complex anticancer therapies are at high-risk of TCM. Moreover, there are also few reports of TCM associated with oncological treatment, mostly chemotherapy. Recent data from large registries indicate a surprisingly high incidence of malignancy in TCM, significant differences in clinical characteristics and unfavorable short- and long-term clinical outcomes in this specific group of patients. Therefore, we present two case reports of TCM that occurred during active anticancer therapy. Both women were admitted with suspicion of acute coronary syndrome. The first patient underwent mastectomy two years before due to hormone receptor-positive breast cancer and on admission she was during adjuvant hormonotherapy with tamoxifen. The admission of the second patient was preceded by fifteen fractions of adjuvant external beam radiotherapy due to intermediate-risk endometrial cancer after radical hysterectomy. Based on coronary angiography type I of acute coronary syndrome was excluded. Both patients negated stressful situations in the period immediately before the symptoms onset. Within hospital course baseline apical ballooning observed in both cases fully recovered and enabled subsequent completion of oncological treatment in accordance with adopted treatment protocols without recurrence of TCM. To our knowledge, presented cases are the first reports showing direct relationship between TCM and adjuvant hormonotherapy with tamoxifen or pelvic radiotherapy.